Integrate with the newly introduced MediaStore.openAssetFileDescriptor API

[Omaaarz]

Description

Update FileDescriptorLocalUriFetcher, StreamLocalUriFetcher and AssetFileDescriptorLocalUriFetcher to make use of the newly created MediaStore.openAssetFileDescriptor when opening Media content URI.

Motivation and Context

New API (MediaStore.openAssetFileDescriptor) has been added in SDK extension 16.

[google-cla[bot]]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[falhassen]

Can you flag-guard this change?