Bump version + release notes

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=169257339

RELEASENOTES.md

 # Release notes #
 
+### r2.5.3 ###
+
+* IMA extension: Support skipping of skippable ads on AndroidTV and other
+  non-touch devices ([#3258](https://github.com/google/ExoPlayer/issues/3258)).
+* HLS: Fix broken WebVTT captions when PTS wraps around
+  ([#2928](https://github.com/google/ExoPlayer/issues/2928)).
+* Captions: Fix issues rendering CEA-608 captions
+  ([#3250](https://github.com/google/ExoPlayer/issues/3250)).
+* Fix adaptive switching for live playbacks close to the live edge
+  ([#3017](https://github.com/google/ExoPlayer/issues/3017)).
+* Workaround broken AAC decoders on Galaxy S6
+  ([#3249](https://github.com/google/ExoPlayer/issues/3249)).
+* Caching: Fix infinite loop when cache eviction fails
+  ([#3260](https://github.com/google/ExoPlayer/issues/3260)).
+* Caching: Force use of BouncyCastle on JellyBean to fix decryption issue
+  ([#2755](https://github.com/google/ExoPlayer/issues/2755)).
+
 ### r2.5.2 ###
 
 * IMA extension: Fix issue where ad playback could end prematurely for some

constants.gradle

@@ -24,7 +24,7 @@ project.ext {
     supportLibraryVersion = '25.4.0'
     dexmakerVersion = '1.2'
     mockitoVersion = '1.9.5'
-    releaseVersion = 'r2.5.2'
+    releaseVersion = 'r2.5.3'
     modulePrefix = ':'
     if (gradle.ext.has('exoplayerModulePrefix')) {
         modulePrefix += gradle.ext.exoplayerModulePrefix

demo/src/main/AndroidManifest.xml

@@ -16,8 +16,8 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.android.exoplayer2.demo"
-    android:versionCode="2502"
-    android:versionName="2.5.2">
+    android:versionCode="2503"
+    android:versionName="2.5.3">
 
   <uses-permission android:name="android.permission.INTERNET"/>
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

library/core/src/main/java/com/google/android/exoplayer2/ExoPlayerLibraryInfo.java

@@ -31,13 +31,13 @@ public final class ExoPlayerLibraryInfo {
    * The version of the library expressed as a string, for example "1.2.3".
    */
   // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION_INT) or vice versa.
-  public static final String VERSION = "2.5.2";
+  public static final String VERSION = "2.5.3";
 
   /**
    * The version of the library expressed as {@code "ExoPlayerLib/" + VERSION}.
    */
   // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
-  public static final String VERSION_SLASHY = "ExoPlayerLib/2.5.2";
+  public static final String VERSION_SLASHY = "ExoPlayerLib/2.5.3";
 
   /**
    * The version of the library expressed as an integer, for example 1002003.
@@ -47,7 +47,7 @@ public final class ExoPlayerLibraryInfo {
    * integer version 123045006 (123-045-006).
    */
   // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
-  public static final int VERSION_INT = 2005002;
+  public static final int VERSION_INT = 2005003;
 
   /**
    * Whether the library was compiled with {@link com.google.android.exoplayer2.util.Assertions}