Finalize r2.5.0

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=164434615

RELEASENOTES.md

 # Release notes #
 
-### r2.5.0 (beta) ###
+### r2.5.0 ###
 
 * IMA extension: Wraps the Google Interactive Media Ads (IMA) SDK to provide an
   easy and seamless way of incorporating display ads into ExoPlayer playbacks.
   You can read more about the IMA extension
   [here](https://medium.com/google-exoplayer/playing-ads-with-exoplayer-and-ima-868dfd767ea).
 * MediaSession extension: Provides an easy to to connect ExoPlayer with
-  MediaSessionCompat in the Android Support Library. *A link to a blog post
-  about this extension will be added here prior to the stable 2.5.0 release.*
+  MediaSessionCompat in the Android Support Library.
 * RTMP extension: An extension for playing streams over RTMP.
 * Build: Made it easier for application developers to depend on a local checkout
   of ExoPlayer. You can learn how to do this
@@ -18,8 +17,7 @@
     playback of progressive streams
     ([#2926](https://github.com/google/ExoPlayer/issues/2926)).
   * New DynamicConcatenatingMediaSource class to support playback of dynamic
-    playlists. *A link to a blog post about DynamicConcatenatingMediaSource will
-    be added here prior to the stable 2.5.0 release.*
+    playlists.
   * New ExoPlayer.setRepeatMode method for dynamic toggling of repeat mode
     during playback. Use of setRepeatMode should be preferred to
     LoopingMediaSource for most looping use cases. You can read more about

constants.gradle

@@ -24,7 +24,7 @@ project.ext {
     supportLibraryVersion = '25.4.0'
     dexmakerVersion = '1.2'
     mockitoVersion = '1.9.5'
-    releaseVersion = 'r2.5.0-beta3'
+    releaseVersion = 'r2.5.0'
     modulePrefix = ':'
     if (gradle.ext.has('exoplayerModulePrefix')) {
         modulePrefix += gradle.ext.exoplayerModulePrefix

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 = "2.5.0-beta3";
+  public static final String VERSION = "2.5.0";
 
   /**
    * 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/2.5.0-beta3";
+  public static final String VERSION_SLASHY = "ExoPlayerLib/2.5.0";
 
   /**
    * The version of the library expressed as an integer, for example 1002003.