Add a callback for users of the StorageManager API to be able to receive
notifications when the requested operation completes for mountObb and
unmountObb.
Add NDK API to get to ObbInfo like the Java API has.
Also update the docs for the API and remove the "STOPSHIP" comments.
Change-Id: I23a4409c7f8b74d3169614beba920b4d667990a4
Remove auto-generated AIDL files and replace them with manually edited
.java and .cpp/.h files so that binder calls can be made from either
Java or C++.
Update the makefiles to not attempt to generate the AIDL files and also
remove the old auto-generated .java files.
Put all the storage-related C++ things in libstorage so that we don't
pollute other libraries.
Change-Id: I82d1631295452709f12ff1270f36c3100e652806