Reverts #49950

Initiated by: dkwingsmt

Reason for reverting: Head redness

java.lang.RuntimeException: Timeout waiting for firstFrameLatch to signal
	at dev.flutter.scenarios.ExternalTextureFlutterActivity.waitUntilFlutterRendered(ExternalTextureFlutterActivity.java:98)
	at dev.flutter.scenariosui.ScreenshotUtil.capture(ScreenshotUtil.java:122)

Original PR Author: dkwingsmt

Reviewed By: {loic-sharma}

This change reverts the following previous change:
Original Description:
This is the 3rd attempt to land multiview pipeline, following #47239.

The pipeline now properly implements the required logic for scheduleWarmUpFrame to work in a multi-view setup, following the preparation in flutter/flutter#143290 and #50570.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide and the C++, Objective-C, Java style guides.
• I listed at least one issue that this PR fixes in the description above.
• I added new tests to check the change I am making or feature I am adding, or the PR is test-exempt. See testing the engine for instructions on writing and running engine tests.
• I updated/added relevant documentation (doc comments with ///).
• I signed the CLA.
• All existing and new tests are passing.

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