Revert "Revert "Replace field injection with constructor inject..."

Revert submission 3344343-revert-3343291-k2-upgrade-wpp-KWLCODKLEN

Reason for revert: Restoring.

The KeyguardQuickAffordancePickerViewModelTest.kt was missing before

Reverted changes: /q/submissionid:3344343-revert-3343291-k2-upgrade-wpp-KWLCODKLEN

Test: m ThemePickerRoboTests
Bug: 369137871
Flag: EXEMPT minor refactor
Change-Id: Ic3929a63130e36d93a809a0d638d562b7b049eb2
Merged-In: I718113e103da303ddfb102b73c95f9a9b25da132