Add Lens filters ablation and translate toggle feature flags.

- Flags will be bridged in subsequent CLs.

Bug: b/346336597
Change-Id: Icdf82de1387be62ddd2f02dcd1ad180c9e8e72c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5599075


Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Scott Yoder <scottyoder@google.com>
Commit-Queue: Charles Yang <cmyang@google.com>
Cr-Commit-Position: refs/heads/main@{#1313147}