Fix ScanRequest parceling issue

This causes Parcel error and NPE when using the NearbyManager#startScan
API

Ignore-AOSP-First: nearby_not_in_aosp_yet
Test: -m
Fix: 232317796
Change-Id: I4f03bd7c9127056d0c63e1abd0e4d21484166fb0
diff --git a/nearby/framework/java/android/nearby/ScanRequest.java b/nearby/framework/java/android/nearby/ScanRequest.java
index cf2dd43..c717ac7 100644
--- a/nearby/framework/java/android/nearby/ScanRequest.java
+++ b/nearby/framework/java/android/nearby/ScanRequest.java
@@ -73,7 +73,8 @@
                     .setScanMode(in.readInt())
                     .setBleEnabled(in.readBoolean())
                     .setWorkSource(in.readTypedObject(WorkSource.CREATOR));
-            for (int i = 0; i < in.readInt(); i++) {
+            final int size = in.readInt();
+            for (int i = 0; i < size; i++) {
                 builder.addScanFilter(ScanFilter.createFromParcel(in));
             }
             return builder.build();
@@ -209,8 +210,9 @@
         dest.writeInt(mScanMode);
         dest.writeBoolean(mBleEnabled);
         dest.writeTypedObject(mWorkSource, /* parcelableFlags= */0);
-        dest.writeInt(mScanFilters.size());
-        for (int i = 0; i < mScanFilters.size(); ++i) {
+        final int size = mScanFilters.size();
+        dest.writeInt(size);
+        for (int i = 0; i < size; i++) {
             mScanFilters.get(i).writeToParcel(dest, flags);
         }
     }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
index 3a73b9f..21f3d28 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
@@ -45,6 +45,7 @@
 
     private static final int UID = 1001;
     private static final String APP_NAME = "android.nearby.tests";
+    private static final int RSSI = -40;
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
@@ -163,6 +164,14 @@
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void testScanFilter() {
+        ScanRequest request = new ScanRequest.Builder().setScanType(
+                SCAN_TYPE_NEARBY_PRESENCE).addScanFilter(getPresenceScanFilter()).build();
+
+        assertThat(request.getScanFilters()).isNotEmpty();
+        assertThat(request.getScanFilters().get(0).getMaxPathLoss()).isEqualTo(RSSI);
+    }
+
+    private static PresenceScanFilter getPresenceScanFilter() {
         final byte[] secretId = new byte[]{1, 2, 3, 4};
         final byte[] authenticityKey = new byte[]{0, 1, 1, 1};
         final byte[] publicKey = new byte[]{1, 1, 2, 2};
@@ -174,19 +183,12 @@
                 .setIdentityType(IDENTITY_TYPE_PRIVATE)
                 .build();
 
-        final int rssi = -40;
         final int action = 123;
-        PresenceScanFilter filter = new PresenceScanFilter.Builder()
+        return new PresenceScanFilter.Builder()
                 .addCredential(credential)
-                .setMaxPathLoss(rssi)
+                .setMaxPathLoss(RSSI)
                 .addPresenceAction(action)
                 .build();
-
-        ScanRequest request = new ScanRequest.Builder().setScanType(
-                SCAN_TYPE_FAST_PAIR).addScanFilter(filter).build();
-
-        assertThat(request.getScanFilters()).isNotEmpty();
-        assertThat(request.getScanFilters().get(0).getMaxPathLoss()).isEqualTo(rssi);
     }
 
     private static WorkSource getWorkSource() {
diff --git a/nearby/tests/unit/src/android/nearby/ScanRequestTest.java b/nearby/tests/unit/src/android/nearby/ScanRequestTest.java
index a45d8bb..12de30e 100644
--- a/nearby/tests/unit/src/android/nearby/ScanRequestTest.java
+++ b/nearby/tests/unit/src/android/nearby/ScanRequestTest.java
@@ -16,6 +16,7 @@
 
 package android.nearby;
 
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
 import static android.nearby.ScanRequest.SCAN_MODE_BALANCED;
 import static android.nearby.ScanRequest.SCAN_MODE_LOW_POWER;
 import static android.nearby.ScanRequest.SCAN_TYPE_FAST_PAIR;
@@ -39,6 +40,8 @@
 @RunWith(AndroidJUnit4.class)
 public class ScanRequestTest {
 
+    private static final int RSSI = -40;
+
     private static WorkSource getWorkSource() {
         final int uid = 1001;
         final String appName = "android.nearby.tests";
@@ -137,6 +140,7 @@
                 .setScanMode(SCAN_MODE_BALANCED)
                 .setBleEnabled(true)
                 .setWorkSource(workSource)
+                .addScanFilter(getPresenceScanFilter())
                 .build();
 
         // Write the scan request to parcel, then read from it.
@@ -164,4 +168,24 @@
         parcel.setDataPosition(0);
         return ScanRequest.CREATOR.createFromParcel(parcel);
     }
+
+    private static PresenceScanFilter getPresenceScanFilter() {
+        final byte[] secretId = new byte[]{1, 2, 3, 4};
+        final byte[] authenticityKey = new byte[]{0, 1, 1, 1};
+        final byte[] publicKey = new byte[]{1, 1, 2, 2};
+        final byte[] encryptedMetadata = new byte[]{1, 2, 3, 4, 5};
+        final byte[] metadataEncryptionKeyTag = new byte[]{1, 1, 3, 4, 5};
+
+        PublicCredential credential = new PublicCredential.Builder(
+                secretId, authenticityKey, publicKey, encryptedMetadata, metadataEncryptionKeyTag)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .build();
+
+        final int action = 123;
+        return new PresenceScanFilter.Builder()
+                .addCredential(credential)
+                .setMaxPathLoss(RSSI)
+                .addPresenceAction(action)
+                .build();
+    }
 }