Update android plugin instructions

[teaqu]

Hello,

For android, this.init() has been depreciated for a while and is not even usable in the latest capacitor.
I've updated the readme with the new way to add plug-ins.

[reslear]

@teaqu thx for PR :)
could still, everything else d in the documentation check and correct ?
since i am not a java developer

[teaqu]

Hey reslear I unfortunately also have limited Java / android experience however everything else seems OK. I have it running on an emulator and appears to work correctly following the instructions, this was the only change I had to make.

[teaqu]

Updated pull request to use suggested method in https://github.com/ionic-team/capacitor/blob/3.x/android/capacitor/src/main/java/com/getcapacitor/BridgeActivity.java (see doc for init()).

[reslear]

@teaqu thx

[mariusbolik]

Plugin Registration isn't needed anymore since capacitor 3. Lots of plugins removed java part from the docs. See here: https://capacitorjs.com/docs/updating/3-0#switch-to-automatic-android-plugin-loading

So is the registration in MainActivity really required for this plugin?

[reslear]

@mariusbolik could have checked ?

[mariusbolik]

@reslear Plugin is registered correctly along all other Plugins, without putting it in MainActivity.java. I just checked in Logcat:

[reslear]

@mariusbolik Okay, what's the plan?

[mariusbolik]

You cloud update the Documentation and remove the Part where the User should add the Code to MainActivity.java or you leave it as it is. Result is the same, but the end of the story is that no additional code needs to be added to MainActivity.java.

[reslear]

@mariusbolik cool, could you open a PR ?

[teaqu]

Yeah seems to work without for me too created a pull request.