build: fix builds when first_api_level isn't defined as property

Bug: 67965044
Test: Build pixel
Merged-In: I4bce5a4f4d0751a30bf7abda0da5e7d73313c9ef
Change-Id: I4bce5a4f4d0751a30bf7abda0da5e7d73313c9ef
Signed-off-by: Sandeep Patil <sspatil@google.com>
(cherry picked from commit b79196f0ca4f553bd4dd9109d1a8a71c623872da)
1 file changed