Robert Berry 98a8e24148 Add flag indicating transport is device-to-device transfer
This flag allows BackupAgent instances to optionally backup more data
for a device-to-device transfer. i.e., an app developer might want to
only backup certain sensitive data if the transport is either
client-side encrypted or a direct device-to-device transfer.

Test: none, as it is just adding a flag
Bug: 72486408
Change-Id: I7512ed0b1510f48789fe47cb8b7379674c315e76
2018-01-25 13:44:10 +00:00
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