Add service type for foreground service.

Starting Android 14, all foreground services are required to specify
their type in the `startForeground` call. This type must be added to
the service's manifest as well.

This CL specifies DeviceAsWebcam service as a "camera" service
and updates AndroidManifest for the same.

Bug: 279669510
Test: Manually tested that service comes up on *-user builds
Change-Id: I78a82019fea515d82550b3ccd8040d4facf398bf
2 files changed