Activity instances should not be attached by default.

Closes #826, #934.
Patched a StackOverflowError when a ValueAnimator is animating

Since Robolectric doesn't actually have a Looper queue the per-frame
Runnables from ValueAnimator run in a single stack which overflows
very easily.

Closes #902.
Implement ShadowResources.openRawResourceFd.

Closes #900.
Fix missing manifest warnings in test output.

Closes #936.