-Added playback speed control dialog to allow full user control over player tempo and pitch parameters.

-Changed tempo and pitch button in service player activity and tempo button in main video player to open speed control dialog.
-Changed LIVE button to be no longer clickable when player position is at or beyond default position.
-Changed main video player to use AppCompatActivity rather than Activity.
-Fixed video player tempo button not updating when player speed parameters change.
-Fixed player crashing on lower sdk versions due to no MediaButtonReceiver, added intent back to manifest.
-Fixed inconsistent gradle library naming.
-Fixed stetho dependencies incorrect version.

app/src/main/AndroidManifest.xml

@@ -28,6 +28,12 @@
             </intent-filter>
         </activity>
 
+        <receiver android:name="android.support.v4.media.session.MediaButtonReceiver" >
+            <intent-filter>
+                <action android:name="android.intent.action.MEDIA_BUTTON" />
+            </intent-filter>
+        </receiver>
+
         <activity
             android:name=".player.old.PlayVideoActivity"
             android:configChanges="orientation|keyboardHidden|screenSize"