Promote or demote stable and flaky flicker tests

Promote:
- stable postsubmit to presubmit
- stable flaky to postsubmit

Demote:
- unstable presubmit to flaky

Test: atest FlickerLibTest FlickerTests WMShellFlickerTests
Bug: 186115871
Bug: 186510496
Bug: 172776659
Bug: 178447631
Bug: 175687842
Bug: 151179149
Bug: 169271943
Bug: 161435597
Bug: 185400889
Change-Id: If3a47e6e93219e58c28d9cc916fc449951120c59