Update IMA SDK and Play Services Ads versions

Since version 17.0 play-services-ads requires specifying AD_MANAGER_APP=true in
AndroidManifest.xml, so add this in the IMA extension's manifest. See also
https://developers.google.com/ad-manager/mobile-ads-sdk/android/quick-start.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=222087771

extensions/ima/build.gradle

@@ -31,13 +31,13 @@ android {
 }
 
 dependencies {
-    api 'com.google.ads.interactivemedia.v3:interactivemedia:3.9.4'
+    api 'com.google.ads.interactivemedia.v3:interactivemedia:3.10.2'
     implementation project(modulePrefix + 'library-core')
-    implementation 'com.google.android.gms:play-services-ads:15.0.1'
+    implementation 'com.google.android.gms:play-services-ads:17.1.1'
     // These dependencies are necessary to force the supportLibraryVersion of
     // com.android.support:support-v4 and com.android.support:customtabs to be
     // used. Else older versions are used, for example via:
-    // com.google.android.gms:play-services-ads:15.0.1
+    // com.google.android.gms:play-services-ads:17.1.1
     // |-- com.android.support:customtabs:26.1.0
     implementation 'com.android.support:support-v4:' + supportLibraryVersion
     implementation 'com.android.support:customtabs:' + supportLibraryVersion

extensions/ima/src/main/AndroidManifest.xml

@@ -15,6 +15,10 @@
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.android.exoplayer2.ext.ima">
-  <meta-data android:name="com.google.android.gms.version"
-      android:value="@integer/google_play_services_version"/>
+  <application>
+    <meta-data android:name="com.google.android.gms.ads.AD_MANAGER_APP"
+        android:value="true"/>
+    <meta-data android:name="com.google.android.gms.version"
+        android:value="@integer/google_play_services_version"/>
+  </application>
 </manifest>