Include -isysroot -arch and -miphoneos-version-min when creating dummy module App.framework (#97689)

Supports the desktop text editing interaction of holding shift, tapping the field, and dragging to modify the selection.

use 'dart pub' instead of calling the pub executable directly

* Marks Linux_android opacity_peephole_fade_transition_text_perf__e2e_summary to be unflaky

* trigger builds
Co-authored-by: Keyong Han <keyonghan@google.com>