Camera: Add visual samples for android.scaler.cropRegion docs

To better document the cropping specification for camera2, add diagrams
from source.android.com into the reference docs as well.

Test: Docs build, look correct

Change-Id: I1a5cafd3ba51aa1631e73140fd00a2a85ddc3e10
diff --git a/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-11-ratio.png b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-11-ratio.png
new file mode 100644
index 0000000..b6c0765
--- /dev/null
+++ b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-11-ratio.png
Binary files differ
diff --git a/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-169-ratio.png b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-169-ratio.png
new file mode 100644
index 0000000..4e975e5
--- /dev/null
+++ b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-169-ratio.png
Binary files differ
diff --git a/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-43-ratio.png b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-43-ratio.png
new file mode 100644
index 0000000..a331095
--- /dev/null
+++ b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-43-ratio.png
Binary files differ
diff --git a/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-43-square-ratio.png b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-43-square-ratio.png
new file mode 100644
index 0000000..41e6668
--- /dev/null
+++ b/docs/images/camera2/metadata/android.scaler.cropRegion/crop-region-43-square-ratio.png
Binary files differ