Reland "Split DisplayListBuilder into DlCanvas optimizer and DlOp recorder classes #44718"

[flar]

Fixes: flutter/flutter#133200

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The original was reverted due to rendering issues with some Flare assets. The problem was that a layer could decide that it was a "NOP" due to the paint it will use to blend in with the scene - but clip and transform methods could also become a NOP due to setting the transform or clip to empty/non-invertible. Both conditions can happen independently and so neither should override the other's conclusion, but that is exactly what the clip/transform methods were doing.

The fix is in the last commmit - only have clip/transform methods set the NOP flag to true when they cause a NOP condition. It can only become false on a restore that ends the NOP layer.

[flar]

Verified with internal testing that the project that discovered the bug is now working with this fix.

[jonahwilliams]

RSLGTM

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Some benchmark improvements from relanding this work:

• gradient static perf, 90% frame build times
• gradient static perf, average frame build times

[chinmaygarde]

Awesome. I am assuming the preview dip was from the last attempt that got reverted?

[flar]

Awesome. I am assuming the preview dip was from the last attempt that got reverted?

Yes, it does line up perfectly with those commits.

[flar]

My guess is that I removed some cases where I avoided an extra "pointer to shared_ptr" copy that was independent from the actual work being done in this PR. It could have been patched in independently.

(DlPaint has both Foo* getFooPtr() and shared_ptr getFoo() methods as well as set-by-pointer and set-by-shared equivalents. When you transfer a value from one paint to another using the Ptr versions you end up needing to create a copy rather than sharing the value. I found a couple of those in the builder code while I was implementing this change.)