Restart the MTP connection when changing transcode enabled

To workaround some issues with transcoded file sizes transferred
via MTP on Windows machines, we restart the MTP connection after
changing the transcode flag.

Test: Manual
Bug: 184117074
Bug: 190422448
Change-Id: I8d151117e1f5d23c3ec20e8c7a4b4546c96f2c84
1 file changed