Pass PLATFORM_VERSION to Soong

Soong needs PLATFORM_VERSION to pass as --version-name when building
framework-res.apk.

Bug: 78324052
Test: aapt dump badging $OUT/system/framework/framework-res.apk  | grep -i version
Change-Id: If47839182a1dd7c7a768b1253dd8b575d777ca7e