The fuse data provider for adb/sdcard shares common code and structures.
This cl creates a FuseDataProvider base class and provides
implementations for adb and sdcard.
In the follow cls, we can kill the provider_vtab struct; and also add
another implementation to parse a block map file and provides data.
Test: unit tests pass, sideload a package, apply a package from sdcard
Change-Id: If8311666a52a2e3c0fbae0ee9688fa6d01e4ad09
Move the module into a separate directory so that we can export only the
expected header.
With this change, minadbd no longer needs to include bootable/recovery.
Test: mmma -j bootable/recovery
Change-Id: I69b888ceb160a33a67d79c5bda208dc17ad6ed86
