Convert test assertions to truth.

Using truth library gives a better error message for the
currently-failing test.

Bug: 37709377
Test: Ran the unit tests.
Change-Id: Ia73937712954384244ab5f734a1a824bc2968e87
3 files changed
tree: 2dd767562e65af4fbc48c16d8cf277d4da243b30
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags