Bugfix/multiple rear cameras fix

[carrawao]

Fixes a problem with multiple rear cameras on the latest android devices

[Davidace136]

Hello, I am a user who suffered for weeks trying to resolve the issue regarding multiple rear and front cameras. I tried all sorts of stuff and read every and single open/close issue, but still couldn't get on with it. But this, people, this, freed me from my worries at an instant. It was so efficient that I almost felt too sorry for my wasted time. Please officially merge this pull request to the main code since more users with multiple rear and front cameras will use this library as the smartphone models are advancing quick.