Implemented ShadowContentResolver.acquireUnstableProvider().

This method is used by various ContentResolver methods in the android
source, so should help with re-using existing logic more. It helped with
ContentResolver.openAssetFileDescriptor().

Closes #961.
AndroidManifest must be parsed before returning ActivityDatas.

Closes #963.
Fix error when creating SQLiteDatabase.

Closes #967.
Implement AccountManager.invalidateAuthToken.

Closes #971.
Add support to ObjectAnimator for multiple keyframes.
Add support to ObjectAnimator for a single keyframe.
Merge pull request #975 from pivotal-odell/objectAnimator-multipleKeyFrames

Add support to ObjectAnimator for multiple keyframes.
Ensure that @BeforeClass and @AfterClass methods are called on the same
classloader as @Test methods.

Closes #969.
added Parcel.openFileDescriptor() so that it will return an actual FD.  However, currently only supports READ mode.
trying to add more Parcel.openFileDescriptor() tests.
Merge branch 'ParcelShadowAndTests' of https://github.com/dbreese/robolectric into ParcelShadowAndTests