3287 [in_app_purchase] Added serviceTimeout code (cla: yes, waiting for tree to go green)

3304 [ci][image_picker]enable xcode 12/iOS 14 for all tasks except lint (cla: yes, waiting for tree to go green)

3339 Remove custom null safety analysis_options files (cla: yes, waiting for tree to go green)

3348 [local_auth] Update README for Android Integration (cla: yes, waiting for tree to go green)

3376 [camera] Update camera_platform_interface dependency to 1.2.0 (cla: yes, waiting for tree to go green)

3377 [camera] Revert platform interface dependency to lower version (cla: yes, waiting for tree to go green)