36331 Minor fixes to precache help text (attempt #2) (cla: yes, tool)

36333 fix sliver fixed pinned appbar (cla: yes, framework, waiting for tree to go green)

36334 Added a Driver API that waits until frame sync (a: tests, cla: yes, framework)

36379 Add missing test case for Usage (cla: yes, tool)

36384 rename the test app android_views to platform_views  (cla: yes, team)

36391 Adds doc example for Listview and pageview (cla: yes, d: api docs, framework)

36392 Increase pattern that matches operation duration in log_test (a: tests, cla: yes, tool, waiting for tree to go green)

36394 Add missing protobuf dependency (cla: yes, tool)