- Introduce FragmentManager public API, for all Fragment management
needs. Will in the future allow the removal of the (growing number
of) fragment APIs on Activity.
- Fragment now has a concept of arguments. This can be supplied
immediately after creation, and are retained across instances.
- PreferenceActivity now has an API to have it update its headers (note
not tested). Headers now have arguments. Keys for controlling
when PreferenceActivity shows at launch have been added to the SDK.
- Fixes to back stack handling and state saving/restoring.
Change-Id: Ib9d07ae2beb296c4eb3a4d9e1b3b59544675e819
b7a2e47722