Fix VP9 on Android M and below by advertising profile level

[zeninsta]

On Android M and below, VP9 codecCapabilities do not advertise profile level support. In this case, estimate the level from MediaCodecInfo.VideoCapabilities instead. https://developer.android.com/reference/android/media/MediaCodecInfo.CodecProfileLevel.html

This change is ported from chromium media: https://chromium.googlesource.com/chromium/src/media/+/master/base/android/java/src/org/chromium/media/MediaCodecUtil.java#296

[google-cla]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here with @googlebot I signed it! and we'll verify it.

---

What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
• The email used to register you as an authorized contributor must be the email used for the Git commit. Check your existing CLA data and verify that your email is set on your git commits.
• The email used to register you as an authorized contributor must also be attached to your GitHub account.

ℹ️ Googlers: Go here for more info.

[ojw28]

Please see the inline comments. If these can be addressed then we will get this merged. Thanks!

[ojw28]

Thanks! We will get this merged in.

[ojw28]

See some more inline comments. In particular, I think the bitrate values are incorrect.

[ojw28]

I think it would make sense to always assume VP9Level1 is supported.

[ojw28]

Hi. I merged this with the bitrate adjustments and a few other tweaks. You can view and check the final version here. Please let us know if there are any issues, and thanks for your contribution!