Fix android device detection when connected to a remote emulator (in this case device name contains ':').
Use $(CFG_ADB) for all adb invocations.
auto merge of #11307 : vadimcn/rust/test-adb, r=brson

Fix android device detection when connected to a remote emulator (in this case device name contains ':').
Use $(CFG_ADB) for all adb invocations.