Set the container field of aconfig flags
Test: printflags --format='{package}:{container}:' | grep "::"
Bug: 312769710
Flag: NONE
Change-Id: I4fc69f563ead7206ef48278be4fb4cbcfc9cb1f7
This flag will guard soft removal of the logic to honor
the CarrierConfigManager.KEY_HIDE_ENABLE_2G API.
Bug: 300248708
Test: m Settings
Change-Id: I6a0e94f7208a4f148a3758b327fcd4990175038b