Enable Java 8 support.

This enables compiler support for Java 8 features.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=198709705

RELEASENOTES.md

@@ -2,6 +2,10 @@
 
 ### dev-v2 (not yet released) ###
 
+* Turned on Java 8 compiler support for the ExoPlayer library. Apps that depend
+  on ExoPlayer via its source code rather than an AAR may need to add
+  `compileOptions { targetCompatibility JavaVersion.VERSION_1_8 }` to their
+  gradle settings to ensure bytecode compatibility.
 * Fix inconsistent `Player.EventListener` invocations for recursive player state
   changes ([#4276](https://github.com/google/ExoPlayer/issues/4276)).
 * IMA: Don't advertise support for video/mpeg ad media, as we don't have an

demos/cast/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         versionName project.ext.releaseVersion
         versionCode project.ext.releaseVersionCode

demos/ima/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         versionName project.ext.releaseVersion
         versionCode project.ext.releaseVersionCode

demos/main/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         versionName project.ext.releaseVersion
         versionCode project.ext.releaseVersionCode

library/core/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion

library/dash/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion

library/hls/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion

library/smoothstreaming/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion

library/ui/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion

testutils/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion

testutils_robolectric/build.gradle

@@ -18,6 +18,11 @@ android {
     compileSdkVersion project.ext.compileSdkVersion
     buildToolsVersion project.ext.buildToolsVersion
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion