* automatically detect if emma is on device
* build emma into libcore if necessary
* stop runtime before adb sync and restart afterwards
Change-Id: I6f1beacdd266310c481351165a054dca8f8657b2
With this change, also refactored runtest as follows: Modified the
test suite schema and python implementation to have an inheritance
structure. Each test type has its own python module, which will
also handle the logic of running the test.
