Atest: validate every cc method before testing.

Bug: 177970662

Test: m atest
atest-dev --dry-run \
  AidlTestSuite/AidlTest#AcceptMissingPackage/cpp (O)
atest-dev --dry-run \
  AidlTestSuite/AidlTest#AcceptMissingPackages/cpp (X)
atest-dev --dry-run \
 InputDispatcherTest#InjectInputEvent_ValidatesKeyEvents,no_such_method (X)
atest-dev --dry-run \
 InputDispatcherTest#InjectInputEvent_ValidatesKeyEvents,InjectInputEvent_ValidatesMotionEvents  (O)

However, this CL does not support:
 AidlTestSuite/AidlTest.AcceptMissingPackage/cpp

Change-Id: I7c1f16fcdaccea0c99f16508142a68ee0c81afb9
1 file changed