Add documentation specifying that camera devices advertised by getConcurrentStreamingCameraIds() refer to those devices which can be configured concurrently by the same client application. Bug: 150225538 Test: m offline-sdk-docs Change-Id: I4997f10ca73de45fd58d22261c7456402d761a57 Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>