[Android] Extend android install timeout to 5 minutes for testing

For android trybots, they will use emulator to run tests.
On emulator, the operation will take really a lot of time.
[Android] When running android test, try killing adb if no devices found

It randomly happens that adb devices return empty list even device
is actually connected, killing adb and restart it can fix this.

CL=https://codereview.chromium.org/24194002
Merge pull request #62 from wang16/android_test

[Android] Fix in chromium to enable instrumentation test for crosswalk on android