Camera: Clarify interaction between aeTargetFpsRange and minDuration am: 60d00de58e am: 8edf6c474c am: d2d7d61098

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/24867909

Change-Id: Ic4393276fa7b83ca7bcc8c10b55f1ba3876975be
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>