FEM-2502 AndroidX migration + ExoPlayer upgrade (#546)

* - AndroidX migration
- Upgraded gson to 2.8.5
- Upgraded okhttp to 3.14.2
- Upgraded ExoPlayer to 2.10.1

* - API change for 2.10.1 for roleFlag in Subtitles
- Refactored MediaPlayerWrapper

* - Updated CustomVideoCodecRenderer class.
- Keeping the old file for the track.

* - Removed CustomVideoCodecRendererOld
- Added CustomMediaCodecRenderer

* - Decoder re-usability on change media.
https://exoplayer.dev/doc/reference/com/google/android/exoplayer2/ExoPlayer.html#setForegroundMode-boolean-

* - API Change : Added listener to bandwidth meter.

* - clean up

* - Restrict max supported bitrate to 5 Gbps
- ADAPTIVE support having -1 value is not supported in Exoplayer now, so changed the logic accordingly.

* - Issue Resolved: Lowest bitrate tracks was not being added.
- Now the isAdaptiveTrack is being analysed based on the flag present in the track.
- Removed the restriction of 5Gbps track. Logic is solely dependent on exoplayer now.

* - ExtractorMediaSource is deprecated.
- Code cleanup

* - Removed unused imports

* - Reverted track selection code
- google/ExoPlayer#5971

* - google/ExoPlayer#5991

Relying on Exoplayer for track selection

* - Role Flag was not being used
- Version updates for gson and okhttp
*     @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)

.travis.yml

@@ -6,7 +6,7 @@ jdk:
 android:
   components:
     - tools
-    - build-tools-27.0.3
+    - build-tools-28.0.3
     - android-28
 before_script:
   - curl https://kaltura.github.io/fe-tools/android/license.sh | sh

playkit/build.gradle

@@ -11,7 +11,7 @@ android {
         minSdkVersion 16
         targetSdkVersion 28
         versionName playkitVersion  // defined in version.gradle
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -35,7 +35,7 @@ tasks.withType(Javadoc) {
 
 dependencies {
 
-    def exoPlayerVersion = '2.9.6'
+    def exoPlayerVersion = '2.10.1'
 
     api 'com.google.code.gson:gson:2.8.2'
 
@@ -46,13 +46,14 @@ dependencies {
     api "com.google.android.exoplayer:exoplayer-ui:$exoPlayerVersion"
     api "com.google.android.exoplayer:extension-okhttp:$exoPlayerVersion"
 
+    implementation 'androidx.annotation:annotation:1.0.2'
+
     // Ok is (optionally) used by ExoPlayer now
-    api("com.squareup.okhttp3:okhttp:3.12.1")
+    api('com.squareup.okhttp3:okhttp:3.12.1')
 
     // Tests
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.hamcrest:hamcrest-library:1.3'
     testImplementation "org.mockito:mockito-core:2.15.0"
-    androidTestImplementation 'com.android.support.test:runner:1.0.2'
-    implementation 'com.android.support:support-annotations:28.0.0'
+    androidTestImplementation 'androidx.test:runner:1.1.1'
 }

playkit/src/androidTest/java/com/kaltura/playkit/player/SourceSelectorAndroidTest.java

@@ -1,6 +1,6 @@
 package com.kaltura.playkit.player;
 
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.kaltura.playkit.PKDrmParams;
 import com.kaltura.playkit.PKMediaEntry;