Camera: Enable camera extension latency range queries

Allow Camera2 extension clients to query best/worst multi-frame
capture latency ranges if available.

Bug: 179819443
Test: make docs,
atest -c
cts/tests/camera/src/android/hardware/camera2/cts/CameraExtensionCharacteristicsTest.java

Change-Id: I3f8c51d7cefbb58c79e3e75962a7b4d6283d24df