Add min_sdk_version for VMDebug tests

These are a part of MCTS tests and they would run on Android 12 and
above. So set the min_sdk_version to 31.

Bug: 407458152
Test: atest CtsVMDebugDeviceTestCases
Flag: TEST_ONLY
Change-Id: I024769600895616e3d83c98e2ca66eead83c711e
1 file changed