994b85480 Revert "Reland "Remove pipeline in favor of layer tree holder" (#24947)" (flutter/engine#25027) (#78382)

This reverts commit 93fb2586.

* b2d02f782 Roll Fuchsia Linux SDK from GsRYVri0-... to aRqEDMjwC... (flutter/engine#24990)

* 3a1a3e6cf Roll Skia from 7854da39b3c1 to 4fb13e026b6b (20 revisions) (flutter/engine#24993)

* e3a84f9b0 Fixed issue where the gpu disable syncswitch was being overridden after init. (flutter/engine#24958)

* aa8369185 fix selectable text selections are not announced in voice over (flutter/engine#24933)

* 04b045185 fixes reference retaining issue in flutter text input plugin (flutter/engine#24768)

* 1ea7dc6b3 Set automatic simulator rotation in scenario test (flutter/engine#24985)

* 38977a5f4 Implement AXPlatformNodeBase::GetInstanceCountForTesting (flutter/engine#24999)

* a25b0dedb Roll Fuchsia Mac SDK from xOxFrRRO6... to pmsuWkRQA... (flutter/engine#24997)

* 3270c8736 Roll Skia from 4fb13e026b6b to 1aa25c3217b6 (25 revisions) (flutter/engine#25001)

* 96d510417 [deferred components] Handle base module loading units (flutter/engine#24983)

* 6a3d8c7d7 Roll Skia from 1aa25c3217b6 to ead52dc068d5 (1 revision) (flutter/engine#25005)

* 0f52360d1 Hardware Keyboard: macOS (flutter/engine#23469)

This reverts commit 0cbe5975.

* Update icons using new process

* Remove trailing blank line

* regen icons.dart

* regen with new codepoints

* Update material_fonts.version

Keep current Roboto

20375cebc Roll Dart SDK from ce9e3535ae16 to b7e02a713eab (2 revisions) (flutter/engine#24992) (#78252)