commit 3c893f5b2ce44519752880baba32d11d675a1e36
author Ta-wei Yen <twyen@google.com> Thu Nov 30 14:29:18 2017 -0800
committer Ta-wei Yen <twyen@google.com> Fri Dec 01 10:50:35 2017 -0800
tree 086079349afdd8fd9d888f3943b2cb73402229ba
parent c6158aee00783f8d4eacfd1c435f1119f344d4ec

Add DIRTY_RETAIN constant

Previously the DIRTY flag can only be automatically or explicitly set.
There are no option to express "This operation does not change the DIRTY
flag". This causes issue when the voicemail source is downloading
changes from the server instead of uploading and would clobber the flag.

After this CL, if DIRTY is updated with DIRTY_RETAIN, the flag will not
be updated for the operation.

Change-Id: I4ed430865c28c824cbd13ccf884091637b106d8a
Fixes: 64371667
Test: CtsProviderTestCases#VoicemailProviderTest