Revert "Revert "Send multiple scheduler frame timelines.""

This reverts commit caaa47d60b83670206dcd3c34382719b1f247ab5.

Reason for revert: Fix the reverted CL in 2nd CL.

Bug: 198192508
Bug: 204941507
Test: See 2nd CL.

Change-Id: I15c693c2e0a82ef81a490319da11871bd74298b3
7 files changed