[1/n] Create flag for the new tab tearing feature

We’re creating a new flag named `enable_interaction_dependant_tab_tearing_bounds` for the upcoming feature: Smart positioning and size inheritance of the torn tabs

Flag: EXEMPT Flag creation
Bug: 436502207
Test: m
Change-Id: Id145a070d570df564b2ba4e7690b76e3894ee700
2 files changed