added condition to stop and init capture

[cnx-caiobarroso]

Description

This PR prevents the startCapture and stopCapture functions from being called whenever the state isn't the opposite.

Contributing checklist

• [ x] Code must follow existing styling conventions
• [ x] Added a descriptive commit message
• [ x] Sample apps updated if needed

Solves issue(s)

#676

[jeffswartz]

Thanks for the PR @cnx-caiobarroso. Does it need to include changes to the files other than than those in OTScreenCapturer.java? Please remove the unneeded files from the PR.

[cnx-caiobarroso]

@jeffswartz, done!

[Panda-ref]

The original issue clearly claims
com.opentok.android.Camera2VideoCapturer.stopCapture crashing.

How does changing com.opentokreactnative.OTScreenCapturer.stopCapture/startCapture fix it?

It seems unrelated imo

[cnx-caiobarroso]

@Panda-ref Hmm, I guess you are right, but I can't find this "Camera2VideoCapturer" file. Maybe it's related to the Gradle project, or as it uses the Android SDK under the covers it crashes there because of this error.

[pietgk]

Event with it potentially being unrelated, its still an improvement AFAIKT.
So we could merge and finish this PR