2318 [script] Exclude google_sign_in_web from podspec lint. (cla: yes)

2319 [package_info] Fix pedantic lints (cla: yes)

2320 [share] Fix pedantic lints (cla: yes)

2321 [video_player] Fix pedantic lints (cla: yes)

2322 [webview_flutter] Fix pedantic lint errors (cla: yes)

2323 Adds a macos stub implementation of E2EPlugin (cla: yes)

2324 shared_preferences: throw AssertionError on non-mock implementations (cla: yes)

2325 Implement shared_preferences on top of platform interface (cla: yes)

2327 [android_alarm_manager] Update minimum Flutter version to 1.12.0 (cla: yes)