Adds tests for Variable Speed code.

The test changes:
- Adds many, many test cases against a MediaPlayerProxy, checking that
  it behaves to the contract of a MediaPlayer.
- Adds the RealMediaPlayer class to check a real MediaPlayer.
- Adds the VariableSpeed class, to check a VariableSpeed instance
  against the same contract as the MediaPlayer.
- Adds an Android.mk for the unit tests.
- Adds also an AndroidManifest.xml for the unit tests.
- Adds some test asset media files (3gpp file and mp3 file).

Required for the test changes:
- Adds a DynamicProxy class to adapt a MediaPlayer as a
  MediaPlayerProxy class, i.e. to test the implementation of
  MediaPlayerProxy, required to avoid writing an adapter.
- Adds a couple of listeners, OnErrorListener and
  OnCompletionListener, that can be waited for synchronously in unit
  tests.

Improvements as a result of the tests:
- During the testing, fixes the case where we weren't throwing
  IllegalStateException if asked for the duration on released player.
- Refactored the create engine, create and realize output mix, create
  and realize audio player, get play interfaces and callbacks, all
  separated into their own static methods.
- This allows me to create the audio player during the main while loop
  actually after the decoding has begun rather than before starting.
  This work is a precursor to using the decoder's report on sample rate
  and channels as the input to these methods.
- slSampleRate and slOutputChannels no longer computed in the
  constructor, but computed when needed in the construction and
  realization of the audio player.

Other changes:
- Remove some overly verbose logs on getDuration() and
  getCurrentPosition().
- Adding the decoder interface to the callback.
- Extract metadata from decoder method now takes the metadata
  interface, so this will be usable from the decoder callack in a follow
  up.
- Temporarily stop getting the metadata out of the decoder, I'm going
  to be doing it on the decoding callback instead.
- Renames the comment in AndroidManifest.xml to describe the
  correct invocation to run the common tests.

Bug: 5048252
Bug: 5048257
Change-Id: Icdc18b19ef89c9924f73128b70aa4696b4e727c5

1 files changed, 1 insertions, 1 deletions

diff --git a/common/tests/AndroidManifest.xml b/common/tests/AndroidManifest.xml
index 151ec20..cf84c5b 100644
--- a/common/tests/AndroidManifest.xml
+++ b/common/tests/AndroidManifest.xml
@@ -22,7 +22,7 @@
         <uses-library android:name="android.test.runner" />
     </application>
 
-    <!-- Run tests with "runtest common" -->
+    <!-- Run tests with "runtest android-common" -->
     <instrumentation android:name="android.test.InstrumentationTestRunner"
             android:targetPackage="com.android.common.tests"
             android:label="Android Common Library Tests" />