This is just the first change, many more will come to make this feature
really work. The main changes included here are:
1. Skip the writing of ninja file if a module has a cache hit.
2. Handle the case where a skipped module doesn't have the build defs
info for the OrderOnlyStrings dedup logic to work by caching the
missing info.
Bug: 335718784
Test: local manual tests
Change-Id: I32542bd1e7fd268113e072e7f68b51b293d83d03
f072120c00