Update support library modules to contain min_sdk_version

min_sdk_version is necessary to turn on manifest merger in Soong.

Updated with:
(cd androidx/ && pom2bp -regen Android.bp)
(cd extras/app-toolkit/ && pom2bp -regen Android.bp)
(cd extras/constraint-layout-x/ && pom2bp -regen Android.bp)
(cd extras/constraint-layout/ && pom2bp -regen Android.bp)
(cd extras/material-design-split-x/ && pom2bp -regen Android.bp)
(cd extras/material-design-x/ && pom2bp -regen Android.bp)
(cd extras/material-design/ && pom2bp -regen Android.bp)
(cd support/ && pom2bp -regen Android.bp)

Bug: 110848854
Test: m checkbuild
Change-Id: Ic2295dc2dc28f2e38b619b3c1f9bf65781f599c8
8 files changed