staging: sync: make sync independent of android

staging: sync: make sync independent of android

Until now Android Sync framework was being used only in Android,
however, it can be used in Linux too as it provides a generic
synchronization framework. Hence removing Sync framework's dependency
on Android.

bug 1543760
bug 1601262
Bug 200191580

Change-Id: Ia3c21f0171d0147d0a035ff02c0673b63eced54e
Signed-off-by: Naveen Kumar S <nkumars@nvidia.com>
Reviewed-on: http://git-master/r/714736
(cherry picked from commit 07491a7da2671c12200e45e7401a356eef064de0)
Reviewed-on: http://git-master/r/718757
(cherry picked from commit e8b2b8d6e24b9f418cb7043d898bd6a7cf1abc5f)
Reviewed-on: http://git-master/r/1133527
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Jeetesh Burman <jburman@nvidia.com>
Tested-by: Jeetesh Burman <jburman@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>