Fixed some rotation while unlocking screen issue.

- Don't use snapshot that is in different orientation than the current
display orientation. This is a follow up to a previous CL whose
implementation wasn't complete.
- Disabled fixed for unnecessary relaunches when unlocking with
fingerprint sensor introduced in ag/2310557. This causes regression in
the experience from N. We still have the relaunches, but we cover up the
delay by displaying the apps starting window.
- Added more trace log points.

Fixes: 62796190
Fixes: 62904487
Bug: 38494778
Test: go/wm-smoke and manual verification of bug.
Change-Id: Id161a334cb4455dd9eb25c6bb63d5bb3f8a6f1f0