Set min_sdk_version to be part of mainline modules

Modules contributing mainline modules (APK/APEX) should set
min_sdk_version as well as apex_available.

For now setting min_sdk_version doesn't change build outputs.
But build-time checks will be added soon.

Bug: 152655956
Test: m
Merged-In: I880abf1c2e80c76bb6efaa71f530ef18aa86c358
Change-Id: I880abf1c2e80c76bb6efaa71f530ef18aa86c358
(cherry picked from commit 856ad1d402002ab72041989b0ec878afd9e576f9)
2 files changed