* automatically detect if emma is on device
* build emma into libcore if necessary
* stop runtime before adb sync and restart afterwards
Change-Id: Id5087fdd6c0345f2b9b76658a5083b9260af061e
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.
