Add Resources Perf Tests

This changes adds benchamrks for Resources, ResourcesManager,
OverlayManager, and Resources.Theme.

Bug: 136085555
Test: atest OverlayManagerPerfTest
Test: atest ResourcesManagerPerfTest
Test: atest ResourcesPerfTest
Test: atest ResourcesThemePerfTest

Change-Id: I6a3b3275399c161e55ff6ce34e7bc2ae5556edf1