am a7d7e653: am 79b946e8: Some native activity sample code cleanup.

Merge commit 'a7d7e653f02d6148ad0ee06a1c78c7593455b2d1'

* commit 'a7d7e653f02d6148ad0ee06a1c78c7593455b2d1':
  Some native activity sample code cleanup.