SystemUI: fix custom back button image not restoring

Change-Id: I4f564662da21860ab03d10300f52b70590c0f8fc
Signed-off-by: Roman Birg <romanbirg@gmail.com>
take account of RotationVector's new extra parameter

Rotation vector has a new 5th parameter introduced in API 18. But the code classified the 5 parameter the same as it would be 3 and overriden the 4th parameter which is unnecessary and also caused an unexpected behavior.

Issue #63268:
https://code.google.com/p/android/issues/detail?id=63268
Signed-off-by: Balint Ureczky <ubalint@gmail.com>

Change-Id: I6f9a5fc401da655695ab03694b4a74dc5be936ed
Live Volume Steps [1/2]

Change-Id: I1f50a68f5e361976f463b2497e2fea765144e5a1
Merge pull request #25 from VanillaUnicorn/15.3

15.3