2221 [android_intent]remove AndroidX constraint

2268 [android_intent] Add missing DartDocs

Plugin: Battery

General bug fix in the Battery plugin.

2189 [battery] relax the example app minimal required Flutter version

Plugin: Camera

We upgraded the Camera plugin to the
new plugin API, and made some bug fixes.

2057 [Camera] Fixes NullPointerException

2123 [camera] Fix event type check

2219 [camera]remove androidx constraint

Plugin: Connectivity

General bug fixes in the Connectivity plugin.

2212 [connectivity]remove AndroidX constraint

2262 [connectivity] add more documentations, delete example/README

Plugin: e2e