DeviceAsWebcam: Add overlays for physical camera id

Using physical streams reduces power since camera consumes
a bulk of the power.

Bug: 242346116

Test: Manual webcam use; See power reduction
Change-Id: Icd0c7c720128604e0c0987ae90fc3bdb99d9a95a

rro_overlays/DeviceAsWebcamOverlay/Android.bp

@@ -0,0 +1,10 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+runtime_resource_overlay {
+    name: "DeviceAsWebcamLynx",
+    certificate: "platform",
+    product_specific: true,
+    sdk_version: "current",
+}