Camera service: Fix dump() for treble path and rearrange it

Get camera service dump working again in the Treble path, and clean
up the formatting a bit

- Switch to dprintf instead of write() for most dump calls
- Add clearer headers for each section
- Add static metadata details to CameraProviderManager dump

Test: adb shell dumpsys media.camera with Treble both enabled and disabled
Bug: 32991422
Change-Id: Ie1d431b68649777bfe84fbb1be0687dd02e671af