Camera: Add flag for MultiResolutionImageReader public usage

Flag: com.android.internal.camera.flags.multiresolution_imagereader_usage_public
Bug: 338621560
Test: New tests pass
Change-Id: I200d4ac2061175257cf69f060d14e76d7595b4a8
diff --git a/camera/camera_platform.aconfig b/camera/camera_platform.aconfig
index cabfbc4..c9e8ffd 100644
--- a/camera/camera_platform.aconfig
+++ b/camera/camera_platform.aconfig
@@ -186,3 +186,12 @@
     description: "Support setting and getting mirror mode for shared surfaces"
     bug: "298899993"
 }
+
+flag {
+    namespace: "camera_platform"
+    is_exported: true
+    name: "multiresolution_imagereader_usage_public"
+    description: "Make constructor for MultiResolutionImageReader with usage public"
+    bug: "338621560"
+}
+