Add prebuilt metalava

Use a prebuilt metalava for pi-dev.  In future branches it is built
from source.

Bug: 78245848
Test: m checkbuild
Change-Id: I607844e62b029e3eb4148ac6ee1adf851cf37d62
Merged-In: I6055a5a03c1b020c81028a0faf3d57488437a4d2
3 files changed