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.

From the perspective of Mainline modules, min_sdk_version should
be equal to or less than "29"(com.android.media). However, quick
code-search revealed that the minimum of min_sdk_versions of modules
depending on this seems to be 14.

Bug: 152655956
Test: m
Merged-In: Ib53d23a26ecebca4abcebedc4d4ba7cecc2119cb
Change-Id: Ib53d23a26ecebca4abcebedc4d4ba7cecc2119cb
(cherry picked from commit 459aacf9428125a06a2092cc48b14bb3710b49fd)
1 file changed