fix first_api_level property fail in VF projects

Should use "ro.board.first_api_level" for vendor freeze project

Bug: 228778569
Test: run cts VtsHalMediaOmxV1_0TargetStoreTest pass

Change-Id: Ib46206be6267a44aaa0a8235a4f017569bb4de94
(cherry picked from commit a8c914ae693e2f3bc1b86563a6a0e461b18319ff)
Merged-In: Ib46206be6267a44aaa0a8235a4f017569bb4de94
1 file changed