camera2: Add camera-specific data types used for metadata key/value

Adds new public API classes:
* InputOutputFormatsMap
* LensShadingMap
* RggbChannelVector
* StreamConfigurationMap
* TonemapCurve

Adds new @hide classes:
* StreamConfiguration
* StreamConfigurationDuration

Minor changes:
* CameraDevice (doc only)
* Preconditions (new @hide function)

Change-Id: I2f3757e2fe9d63e710f51469c650377165fd6631
11 files changed