Add quirks support for Pi camera (#2241)

- Valid video modes (native modes plus some low-res modes)
- Exposure setting

cscore/src/main/native/linux/UsbCameraImpl.h

@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2016-2019 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2016-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -166,6 +166,7 @@ class UsbCameraImpl : public SourceImpl {
   // Quirks
   bool m_lifecam_exposure{false};    // Microsoft LifeCam exposure
   bool m_ps3eyecam_exposure{false};  // PS3 Eyecam exposure
+  bool m_picamera{false};            // Raspberry Pi camera
 
   //
   // Variables protected by m_mutex