Ensure "DEBUG = false" in frameworks/base unless a reason is given

Found all instances of "static final boolean DEBUG = true"
and replaced with "false" (or removed if DEBUG was unreferenced)
except where an explicit reason for "DEBUG = true" was given
in the source code.

Flag: EXEMPT refactor
Bug: 436095548
Change-Id: I4a858fdc927163ae4c7af471944a747a49e4c139