Update emulated camera to support HAL v2.0 modules and devices.

- Update camera HAL module to version 2

- Break out common camera HAL device functionality into
  EmulatedBaseCamera

- EmulatedCamera is now the base class for all version 1 camera
  devices.

- No camera device version 2 implementation included.

No change to supported functionality.

Change-Id: Iabb0b9a4e41f3c01dfd921256fa8fb1d40d71834

tools/emulator/system/camera/EmulatedCameraHal.cpp

@@ -30,15 +30,15 @@
  */
 camera_module_t HAL_MODULE_INFO_SYM = {
     common: {
-         tag:           HARDWARE_MODULE_TAG,
-         version_major: 1,
-         version_minor: 0,
-         id:            CAMERA_HARDWARE_MODULE_ID,
-         name:          "Emulated Camera Module",
-         author:        "The Android Open Source Project",
-         methods:       &android::EmulatedCameraFactory::mCameraModuleMethods,
-         dso:           NULL,
-         reserved:      {0},
+         tag:                HARDWARE_MODULE_TAG,
+         module_api_version: CAMERA_MODULE_API_VERSION_2_0,
+         hal_api_version:    HARDWARE_HAL_API_VERSION,
+         id:                 CAMERA_HARDWARE_MODULE_ID,
+         name:               "Emulated Camera Module",
+         author:             "The Android Open Source Project",
+         methods:            &android::EmulatedCameraFactory::mCameraModuleMethods,
+         dso:                NULL,
+         reserved:           {0},
     },
     get_number_of_cameras:  android::EmulatedCameraFactory::get_number_of_cameras,
     get_camera_info:        android::EmulatedCameraFactory::get_camera_info,