Bump tethering target sdk version to 31

Also add BLUETOOTH_CONNECT permission which is needed for access
PanService if target sdk 31+. The permission would be granted to
privilege application without prompt.

Also remove the min_sdk_version 29 from AndroidManifest because it is
useless that the Android.bp already define min_sdk_version 30.

$aapt dump xmltree TetheringNext.apk AndroidManifest.xml
N: android=http://schemas.android.com/apk/res/android
  E: manifest (line=19)
    A: android:sharedUserId(0x0101000b)="android.uid.networkstack" (Raw: "android.uid.networkstack")
    A: android:versionCode(0x0101021b)=(type 0x10)0x1f
    A: android:versionName(0x0101021c)="Tiramisu" (Raw: "Tiramisu")
    A: android:compileSdkVersion(0x01010572)=(type 0x10)0x1f
    A: android:compileSdkVersionCodename(0x01010573)="Tiramisu" (Raw: "Tiramisu")
    A: package="com.android.networkstack.tethering" (Raw: "com.android.networkstack.tethering")
    A: platformBuildVersionCode=(type 0x10)0x1f
    A: platformBuildVersionName="Tiramisu" (Raw: "Tiramisu")
    E: uses-sdk (line=23)
      A: android:minSdkVersion(0x0101020c)=(type 0x10)0x1e
      A: android:targetSdkVersion(0x01010270)=(type 0x10)0x1f
    ....
    E: uses-permission (line=35)
      A: android:name(0x01010003)="android.permission.BLUETOOTH_CONNECT" (Raw: "android.permission.BLUETOOTH_CONNECT")

Bug: 204265450
Test: manual testing bluetooth tethering and TH
Change-Id: I6f821020679b9379cada29f6f0816187545a24fb
diff --git a/Tethering/tests/integration/Android.bp b/Tethering/tests/integration/Android.bp
index a2bd1a5..d2188d1 100644
--- a/Tethering/tests/integration/Android.bp
+++ b/Tethering/tests/integration/Android.bp
@@ -48,7 +48,7 @@
 // Use with NetworkStackJarJarRules.
 android_library {
     name: "TetheringIntegrationTestsLatestSdkLib",
-    target_sdk_version: "30",
+    target_sdk_version: "31",
     platform_apis: true,
     defaults: ["TetheringIntegrationTestsDefaults"],
     visibility: [
@@ -128,7 +128,7 @@
     name: "TetheringCoverageTests",
     platform_apis: true,
     min_sdk_version: "30",
-    target_sdk_version: "30",
+    target_sdk_version: "31",
     test_suites: ["device-tests", "mts-tethering"],
     test_config: "AndroidTest_Coverage.xml",
     defaults: ["libnetworkstackutilsjni_deps"],
diff --git a/Tethering/tests/mts/Android.bp b/Tethering/tests/mts/Android.bp
index e51d531..18fd63b 100644
--- a/Tethering/tests/mts/Android.bp
+++ b/Tethering/tests/mts/Android.bp
@@ -22,7 +22,7 @@
     name: "MtsTetheringTestLatestSdk",
 
     min_sdk_version: "30",
-    target_sdk_version: "30",
+    target_sdk_version: "31",
 
     libs: [
         "android.test.base",
diff --git a/Tethering/tests/unit/Android.bp b/Tethering/tests/unit/Android.bp
index 5150d39..ecd1a39 100644
--- a/Tethering/tests/unit/Android.bp
+++ b/Tethering/tests/unit/Android.bp
@@ -87,7 +87,7 @@
     static_libs: [
         "TetheringApiStableLib",
     ],
-    target_sdk_version: "30",
+    target_sdk_version: "31",
     visibility: [
         "//packages/modules/Connectivity/tests:__subpackages__",
         "//packages/modules/Connectivity/Tethering/tests:__subpackages__",