Android bot changes for robustness, profiling, and debugging.

Android bot changes for robustness, profiling, and debugging.

Kill all emulators before starting a test to be more robust on error.
Print error if a file fails to copy to the device.
Speed up emulator launch by 40%.
Increase emulator partition size to fix 'out of space on device' errors.
Log emulator launch time to help profile bot costs.
Run tests in verbose mode to assist with bot debugging.

BUG=None
TEST=

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=112552

[Jeff Bailey (chromium), 2011-12-01 22:07:53]

lgtm