YouTube Video Streaming

[aribhs8]

Add support to start a live streaming session on YouTube through the DocCam app. Make sure to complete the following:

• [x] Create bottom sheet matching wireframe
• [x] Create dialog that opens if user is not signed in with appropriate account
• [x] Create dialog that opens if user is signed in and can start streaming
• [ ] Design a plan for storing and accessing YouTube account details across settings and CameraFragment
• [x] Ability to sign into YouTube through settings
• [ ] Ability to start live streaming session on YouTube

[aribhs8]

When incorporating streaming button make sure to make change such that cancel button still works later on.