Recorder: Add support for PV

[fbogo]

• Allows capture of both PV / RM streams from the Recorder app, by creating 2 distinct frame source groups / sensor frame recorders (one for PV, one for RM).
• A Boolean (_isPV) checks if the FrameRecorder instance is used for RM or PV streams. This is then used to save data in 2 distinct archives and avoid overwriting between streams. At the end of the recording, the app saves 2 archives with 2 different file names (one with suffix "0" for RM recorded data, one with suffix "1" for PV recorded data).
• It is possible to choose which streams to capture by modifying the enabledSensorTypes vector and the enablePV bool in Recorder/AppMain.h.
• There are inconsistencies in recording when the app is launched for the first time on the device -- since the airtap given to enable access to the camera is detected also to start capture. The problem seems to affects also the Recorder app prior to this PR.

[ahojnnes]

The features in this pull request are integrated into another pull request, which makes this one obsolete. The master branch should contain all the changes from here.