55939 Implementation of the Material Date Range Picker. (cla: yes, f: material design, framework, waiting for tree to go green)

55977 Add clipBehavior to widgets with clipRect (cla: yes, f: material design, framework, severe: API break, team, will affect goldens)

55998 Fixes the navigator pages update crashes when there is still route wa… (cla: yes, f: routes, framework, severe: API break, waiting for tree to go green)

56084 Step 1 of 3: Add opt-in fixing Dialog border radius to match Material Spec (a: fidelity, a: quality, cla: yes, f: material design, framework, waiting for tree to go green)

56090 Step 1 of 3: Add opt-in for debugCheckHasMaterialLocalizations assertion on TextField (a: internationalization, a: text input, cla: yes, f: material design, framework, waiting for tree to go green)