Drop unused camera-view dependency and fix gradle.properties trailing newline

[MustafaNazeer]

Summary

Two small build cleanups flagged by the Code Reviewer on PR #26 and PR #27, batched into one PR. No production behavior change.

1. Remove androidx.camera:camera-view:1.4.2. CameraX is used only for headless frame analysis in the vision test (ImageAnalysis, ImageProxy, CameraSelector from camera-core; ProcessCameraProvider from camera-lifecycle). The app never instantiates a PreviewView or CameraController, so the camera-view UI artifact was pulled into the build for nothing. A source-wide search confirms zero androidx.camera.view, PreviewView, CameraController, or LifecycleCameraController references.
2. Add the missing trailing newline to gradle.properties (cosmetic nit from the PR Target Android 15 (API 35) for Play upload #26 review).

Verification

• :app:assembleDebug succeeds.
• Full unit test suite green at 483 passing, 0 failures, 4 skipped, identical to the main baseline, confirming the dependency removal regressed nothing.

Permissions

No change. The manifest still declares CAMERA and RECORD_AUDIO only.

[MustafaNazeer]

Code Reviewer verdict: APPROVED

Independently verified against the source tree, not taken on the PR description's word.

camera-view removal is safe. Grep of app/src/ returns zero matches for androidx.camera.view, PreviewView, CameraController, LifecycleCameraController, and AndroidView, and no res/ reference to a camera preview. The only CameraX symbols actually used are ImageProxy, ImageAnalysis, CameraSelector (camera-core) and ProcessCameraProvider (camera-lifecycle), confirming the headless ImageAnalysis pattern in AndroidCameraSource.kt (bindToLifecycle with DEFAULT_FRONT_CAMERA and an analyzer, no PreviewView).

Required-to-stay dependencies confirmed present. camera-core, camera-camera2, and camera-lifecycle are all still declared. camera-camera2 correctly has no direct import (it is the runtime Camera2 backend loaded reflectively) and was not removed; dropping it would break the camera at runtime with no compile-time signal.

Build and tests. :app:assembleDebug BUILD SUCCESSFUL; full unit suite 483 passing, 0 failures, 0 errors, 4 skipped, identical to the main baseline. A removed-but-unused library cannot affect tests, and the green compile confirms nothing referenced the dropped artifact.

No inherited-rule concerns (config-only diff, no prose added). No new dependency, so no Security sign-off triggered. Ready to merge.