Remove aconfig flags for Connectivity FlaggedAPI annotations

Split flags.aconfig to platform flags and module flags.
Platform flags are used from platform code.
Module flags are used for FlaggedAPI annotations in modules.

Bug: 321624552
Test: TH
Merged-In: Ie8e0f911d0f7d7e81d108b8e8ab539b29a255ad0
Change-Id: Ic868b70b3be10d4e394f005cd55a858acc7ba14d
4 files changed