Acquire the global lock of WM before calling updateConfigIfNeeded

The logic in PackageConfigPersister#updateConfigIfNeeded might access
the ConfigurationContainer fields protected by WindowManagerGlobalLock.
This CL moves the call to
ActivityTaskManagerService.LocalService#onProcessAdded instead.

Fix: 365671924
Flag: com.android.window.flags.insets_decoupled_configuration
Test: atest WindowProcessControllerTests ActivityTaskManagerServiceTests
Change-Id: I0c37eb6ca60e6bc9ca9952441bf47e78fba8b174