Re-Add WiFi reloading config

frameworks/base: support devices with SoftAp that don't require firmware reload

Change-Id: I01e868ad2824c4cb0fdfdae866d794b39cf78095

Conflicts:
	core/res/res/values/slim_symbols.xml

 Changes to be committed:
	modified:   core/res/res/values/config.xml
	new file:   core/res/res/values/slim_symbols.xml
	modified:   services/java/com/android/server/NetworkManagementService.java