Revert "Migrate PlatformLibrary to Soong"

This reverts commit 7e13a25d70d8f3962d394f18f96cf8f35b0ae5bf.

Reason for revert: https://buganizer.corp.google.com/issues/204075767

Change-Id: I6d3c3ef6d2a16969319eee0450ccbb6c89cdd6ec
3 files changed