Add in reboot test to replace existing example test.

Bug: None
Test: Built and ran test successfully.
> tradefed.sh run commandAndExit example/reboot
Change-Id: Ib1db0b1cefbd958d37eaa8636febcc32d3e484a9
3 files changed
tree: 141f37829b281c52b0cda15db77e6c459dff6bed
  1. .gitignore
  2. Android.mk
  3. MANIFEST.mf
  4. README
  5. res/
  6. src/