Add VERSION_SLASHY to ExoPlayerLibraryInfo

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=151994281

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

@@ -76,7 +76,7 @@ import java.util.concurrent.CopyOnWriteArraySet;
    */
    */
   @SuppressLint("HandlerLeak")
   @SuppressLint("HandlerLeak")
   public ExoPlayerImpl(Renderer[] renderers, TrackSelector trackSelector, LoadControl loadControl) {
   public ExoPlayerImpl(Renderer[] renderers, TrackSelector trackSelector, LoadControl loadControl) {
-    Log.i(TAG, "Init " + ExoPlayerLibraryInfo.VERSION + " [" + Util.DEVICE_DEBUG_INFO + "]");
+    Log.i(TAG, "Init " + ExoPlayerLibraryInfo.VERSION_SLASHY + " [" + Util.DEVICE_DEBUG_INFO + "]");
     Assertions.checkState(renderers.length > 0);
     Assertions.checkState(renderers.length > 0);
     this.renderers = Assertions.checkNotNull(renderers);
     this.renderers = Assertions.checkNotNull(renderers);
     this.trackSelector = Assertions.checkNotNull(trackSelector);
     this.trackSelector = Assertions.checkNotNull(trackSelector);

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

@@ -21,17 +21,25 @@ package com.google.android.exoplayer2;
 public interface ExoPlayerLibraryInfo {
 public interface ExoPlayerLibraryInfo {
 
 
   /**
   /**
-   * The version of the library, expressed as a string.
+   * 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.
   String VERSION = "2.3.1";
   String VERSION = "2.3.1";
 
 
   /**
   /**
-   * The version of the library, expressed as an integer.
+   * The version of the library expressed as {@code "ExoPlayerLib/" + VERSION}.
+   */
+  // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
+  String VERSION_SLASHY = "ExoPlayerLib/2.3.1";
+
+  /**
+   * The version of the library expressed as an integer, for example 1002003.
    * <p>
    * <p>
    * Three digits are used for each component of {@link #VERSION}. For example "1.2.3" has the
    * Three digits are used for each component of {@link #VERSION}. For example "1.2.3" has the
    * corresponding integer version 1002003 (001-002-003), and "123.45.6" has the corresponding
    * corresponding integer version 1002003 (001-002-003), and "123.45.6" has the corresponding
    * integer version 123045006 (123-045-006).
    * integer version 123045006 (123-045-006).
    */
    */
+  // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
   int VERSION_INT = 2003001;
   int VERSION_INT = 2003001;
 
 
   /**
   /**

library/core/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -766,7 +766,7 @@ public final class Util {
       versionName = "?";
       versionName = "?";
     }
     }
     return applicationName + "/" + versionName + " (Linux;Android " + Build.VERSION.RELEASE
     return applicationName + "/" + versionName + " (Linux;Android " + Build.VERSION.RELEASE
-        + ") " + "ExoPlayerLib/" + ExoPlayerLibraryInfo.VERSION;
+        + ") " + ExoPlayerLibraryInfo.VERSION_SLASHY;
   }
   }
 
 
   /**
   /**