glaz 2.16.0

Phone app 2.16.0, glasses app 0.19.0 (uploaded by the phone app).

Firmware, for Glasses > Firmware in the app or for nRF Connect:

• frame-firmware-v26.291.1044-glaz.zip -- ours, branch glaz of antono/frame-codebase
• frame-firmware-v25.278.1113.zip -- the newest official release

The Linux bundle needs GStreamer (base and good plugins) and BlueZ.

Full Changelog: v2.15.0...v2.16.0