android_commits.md

The Android codebase moves very fast, and there is little documentation detailing when or where a change is made outside of Google. Even the public documentation often doesn't represent the internals. Here are some commits I feel that I will need again, because nobody else on the internet seems to have them.

1. system/netd/resolv has been moved to packages/modules/DnsResolver as of eff32e.
2. Build.SERIAL is UNKNOWN for all target SDK.