Android: Proguard rules to remove more pieces of logging calls

* Remove String.format() when the result is unused.
* Remove static field gets to SDK classes if the values are unused
  (normally kept in case they trigger <clinit>())

Change-Id: I4e930a4e0d0280571f272b4f335a3768f6e3067a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3880383
Reviewed-by: Sam Maier <smaier@chromium.org>
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1044732}