Add MODIFY_DEFAULT_AUDIO_EFFECTS permission to shell

Add MODIFY_DEFAULT_AUDIO_EFFECTS permission to shell which
is needed to run GTS tests on @systemApis for
audio effects control.

Bug: 148703417
Test: run gts -m GtsAudioTestCases -t com.google.android.audio.gts.DeviceEffectTest#testCreateDeviceEffect
Change-Id: Iba579001aeffd85743850727135a6f536579ea17
Merged-In: Iba579001aeffd85743850727135a6f536579ea17
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index f44f9cf..d1d080c 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -241,6 +241,9 @@
     <!-- Permission needed to read wifi network credentials for CtsNetTestCases -->
     <uses-permission android:name="android.permission.READ_WIFI_CREDENTIAL" />
 
+    <!-- Permission required for testing system audio effect APIs. -->
+    <uses-permission android:name="android.permission.MODIFY_DEFAULT_AUDIO_EFFECTS"/>
+
     <application android:label="@string/app_label"
                 android:theme="@android:style/Theme.DeviceDefault.DayNight"
                 android:defaultToDeviceProtectedStorage="true"