tree 4298ddcf0b5ce74a15a43699adbcc2d27bfb9084
parent 698dc08561643025aec34804fda9f5c551d46305
author xunchang <xunchang@google.com> 1552866312 -0700
committer xunchang <xunchang@google.com> 1553019118 -0700

Create a FuseDataProvider base class

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