Implement PiP receiver. Refactor Example to better implement PiP. Fix view display issue in PiP

[Jmilham21]

What does this Pull Request do?

• Enhance PiP implementation
• Fix Toolbar displaying in PiP issue in Example
• Slightly resolve the PiP issue where player isn't centered

Why is this Pull Request needed?

• PiP on Android isn't working well
• Example app wasn't setup well for PiP

Are there any points in the code the reviewer needs to double check?

• Test implementation with the following config

  let jwConfig = {
    "title": "Single Inline Linear Preroll",
    "playlist": [
      {
        "title": "Single Inline Linear Preroll",
        "file": "https://content.bitsontherun.com/videos/q1fx20VZ-52qL9xLP.mp4"
      }
    ],
    "pipEnabled":true
  }

• Hiccup when switching into PiP... React Native seems to want to reshow the toolbar so I had to take some workaround steps to ensure the Player is rendered in frame of PiP.

Are there any Pull Requests open in other repos which need to be merged with this?

• No

Addresses Issue(s):

• Internal JWP ticket

[david-almaguer]

The code looks good to me 👍