Revert "Revert "dalvik: add placeholder for future changes""

This reverts commit cd2251b84a8c15d970267b77e8116ee0b26289e0.

Change-Id: I399e390fbd1e42b935f1e4ac9d905a9d1e635e96
dalvik: Rename perf flag

Change-Id: I5aab012bbe9e461d24011bca3b3c0fa17b22be5f