Camera: Clarify interaction between aeTargetFpsRange and minDuration am: 60d00de58e am: 9f500d95e7 am: 59c842cc05

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

Change-Id: Ic51031282295957fa986e84d076190d45a1c122e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>