Revert "Migrate ENABLE_GRID_ONLY_OVERVIEW to aconfig flag"

This reverts commit 6f264a927bd4bf37b0632063da8455d0597a4a61.

Reason for revert: Keeping old flag system so we can test in Tapl tests (b/283246928)
Bug: 270397206

Change-Id: I3e6364ebac8018facc3b22e510615735299a3dad
12 files changed