camera: Fix crash when taking photo outside CCA

The weak pointer `camera_app_device` could be invalid outside CCA.
We should check it before using it.

(cherry picked from commit 018ae63)

Bug: 1410771
Test: Manually
Change-Id: I4d6f43f1cd0704db4fac0af18296c8a8115fdf45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4207383
Reviewed-by: Kam Kwankajornkiet <kamchonlathorn@chromium.org>
Reviewed-by: Pi-Hsun Shih <pihsun@chromium.org>
Commit-Queue: Wei Lee <wtlee@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1099669}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4227371
Auto-Submit: Wei Lee <wtlee@chromium.org>
Commit-Queue: Pi-Hsun Shih <pihsun@chromium.org>
Cr-Commit-Position: refs/branch-heads/5481@{#1009}
Cr-Branched-From: 130f3e4-refs/heads/main@{#1084008}

media/capture/video/chromeos/camera_device_delegate.cc

@@ -972,6 +972,7 @@ void CameraDeviceDelegate::ConfigureStreams(
 
     int32_t max_yuv_width = 0, max_yuv_height = 0;
     bool is_recording_multi_stream =
+        camera_app_device &&
         camera_app_device->GetCaptureIntent() ==
             cros::mojom::CaptureIntent::VIDEO_RECORD &&
         camera_app_device->IsMultipleStreamsEnabled();