Merge "docs: Removed Q preview language and added a link to the Android 10 page on developer.android.com." into rvc-dev am: 6dfedd05 am: 53cb3689

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12347462

Change-Id: Ie34c0ba16d25e95b1fcc533c2353710d93de692a