[SB Refactor] Add a flag to enable/disable icon debug colors.

Also remove some deprecated flags.

Fixes: 254512623
Fixes: 254512660
Bug: 238425913
Test: `adb shell cmd statusbar flag 611 on` -> icon shown in bright
debug colors
Test: `adb shell cmd statusbar flag 611 off` -> icon shows in normal
colors

Change-Id: I1cb97e5b12d1f26cd59d92fc0c670aadb59810b6