Revert "Return null for contacts local account"

This reverts commit 56b28d4ad75712723e588e05dc5d0bd01af797b7.
Reverting because partners are concerned about backwards compatibility.

Bug: 188347648
Test: m droid

Change-Id: I84862cbc3e6d991743b27beca20d0c6b6456e02e
1 file changed