Modularize ExoPlayer steps 1 + 2.

1. Move entire library from v2/library/ to v2/library/core
2. Add v2/library/all that depends on v2/library/core

Issue: #2139

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=150455693

extensions/cronet/build.gradle

@@ -29,7 +29,7 @@ android {
 }
 
 dependencies {
-    compile project(':library')
+    compile project(':library-core')
     compile files('libs/cronet_api.jar')
     compile files('libs/cronet_impl_common_java.jar')
     compile files('libs/cronet_impl_native_java.jar')

extensions/ffmpeg/build.gradle

@@ -30,5 +30,5 @@ android {
 }
 
 dependencies {
-    compile project(':library')
+    compile project(':library-core')
 }

extensions/flac/build.gradle

@@ -30,7 +30,7 @@ android {
 }
 
 dependencies {
-    compile project(':library')
+    compile project(':library-core')
     androidTestCompile project(':testutils')
 }
 

extensions/gvr/build.gradle

@@ -24,7 +24,7 @@ android {
 }
 
 dependencies {
-    compile project(':library')
+    compile project(':library-core')
     compile 'com.google.vr:sdk-audio:1.30.0'
 }
 

extensions/okhttp/build.gradle

@@ -29,7 +29,7 @@ android {
 }
 
 dependencies {
-    compile project(':library')
+    compile project(':library-core')
     compile('com.squareup.okhttp3:okhttp:3.6.0') {
         exclude group: 'org.json'
     }

extensions/opus/build.gradle

@@ -30,5 +30,5 @@ android {
 }
 
 dependencies {
-    compile project(':library')
+    compile project(':library-core')
 }

extensions/vp9/build.gradle

@@ -30,6 +30,6 @@ android {
 }
 
 dependencies {
-    compile project(':library')
+    compile project(':library-core')
 }
 

library/all/build.gradle

@@ -22,29 +22,11 @@ android {
     defaultConfig {
         minSdkVersion project.ext.minSdkVersion
         targetSdkVersion project.ext.targetSdkVersion
-        consumerProguardFiles 'proguard-rules.txt'
-    }
-
-    buildTypes {
-        // Re-enable test coverage when the following issue is fixed:
-        // https://code.google.com/p/android/issues/detail?id=226070
-        // debug {
-        //     testCoverageEnabled = true
-        // }
-    }
-
-    sourceSets {
-        androidTest {
-            java.srcDirs += "../testutils/src/main/java/"
-        }
     }
 }
 
 dependencies {
-    compile 'com.android.support:support-annotations:25.2.0'
-    androidTestCompile 'com.google.dexmaker:dexmaker:1.2'
-    androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2'
-    androidTestCompile 'org.mockito:mockito-core:1.9.5'
+    compile project(':library-core')
 }
 
 android.libraryVariants.all { variant ->
@@ -82,6 +64,6 @@ android.libraryVariants.all { variant ->
 
 ext {
     releaseArtifact = 'exoplayer'
-    releaseDescription = 'The ExoPlayer library.'
+    releaseDescription = 'The ExoPlayer library (all modules).'
 }
-apply from: '../publish.gradle'
+apply from: '../../publish.gradle'

library/core/build.gradle

@@ -0,0 +1,52 @@
+// Copyright (C) 2016 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion project.ext.compileSdkVersion
+    buildToolsVersion project.ext.buildToolsVersion
+
+    defaultConfig {
+        minSdkVersion project.ext.minSdkVersion
+        targetSdkVersion project.ext.targetSdkVersion
+        consumerProguardFiles 'proguard-rules.txt'
+    }
+
+    buildTypes {
+        // Re-enable test coverage when the following issue is fixed:
+        // https://code.google.com/p/android/issues/detail?id=226070
+        // debug {
+        //     testCoverageEnabled = true
+        // }
+    }
+
+    sourceSets {
+        androidTest {
+            java.srcDirs += "../../testutils/src/main/java/"
+        }
+    }
+}
+
+dependencies {
+    compile 'com.android.support:support-annotations:25.2.0'
+    androidTestCompile 'com.google.dexmaker:dexmaker:1.2'
+    androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2'
+    androidTestCompile 'org.mockito:mockito-core:1.9.5'
+}
+
+ext {
+    releaseArtifact = 'exoplayer-core'
+    releaseDescription = 'The ExoPlayer library core module.'
+}
+apply from: '../../publish.gradle'

library/core/src/androidTest/AndroidManifest.xml

@@ -16,7 +16,7 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    package="com.google.android.exoplayer2.test">
+    package="com.google.android.exoplayer2.core.test">
 
   <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="24"/>
 
@@ -27,7 +27,7 @@
   </application>
 
   <instrumentation
-      android:targetPackage="com.google.android.exoplayer2.test"
+      android:targetPackage="com.google.android.exoplayer2.core.test"
       android:name="android.test.InstrumentationTestRunner"
       tools:replace="android:targetPackage"/>