3395 Update obsolete button refs in plugin examples (cla: yes, waiting for tree to go green)

3396 [camera] set useAutoFocus to true by default (cla: yes)

3397 Sync the PR template to the new style (cla: yes, waiting for tree to go green)

3399 [image_picker] fix version (cla: yes, waiting for tree to go green)

3400 Ignore deprecated_member_use analysis lint (cla: yes, waiting for tree to go green)

3406 [camera] Fix initialization error in camera example on iOS (cla: yes)

3409 [video_player] Migrate deprecated api (cla: yes)

3410 [path_provider] Migrate path_provider_windows to nullsafety (cla: yes, p: path_provider)