cameraserver: rename getConcurrentStreamingCameraIds -> getConcurrentCameraIds.

Bug: 150896133

Test: builds
Test: atest ConcurrentCameraTest.java

Change-Id: Id73f15164200a4cc91354b67784bab3c470caf57
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
5 files changed