Revert "Prune proguard.flags down to more essential pieces."

Revert "Prune proguard.flags down to more essential pieces."

Revert submission 16305632-b205725937-prune-proguard

Reason for revert:
Caused SysUI crash looping in aosp_coral-userdebug.

Reverted Changes:
I889164a6f:Prune proguard.flags down to more essential pieces...
Id9566fb30:Prune proguard.flags down to more essential pieces...

Bug: 205725937
Fix: 219573930
Test: Manually verified that SysUI is no longer crash looping
Change-Id: Iff4bc5fda397bf3ce8b391e43a0def654b3b4760