Add delegate implementation for Resources.obtainTypedArray

Also updates the test app for layoutlib tests.

Bug: 37134746
Test: RenderTests.testTypedArrays added
Change-Id: I7f8f9c222157d024e30b1d4f24117bdbd91b84c6
(cherry picked from commit 2dcd6b814741d447c6717324de7c48c14aab9886)