Camera: Add extension capture format to extension stats

Test: Build
Bug: 339300919
Change-Id: I92e5cbca44b15a10535b7f817986603b7fe41312
diff --git a/camera/aidl/android/hardware/CameraExtensionSessionStats.aidl b/camera/aidl/android/hardware/CameraExtensionSessionStats.aidl
index 1c81831..a3c0e69 100644
--- a/camera/aidl/android/hardware/CameraExtensionSessionStats.aidl
+++ b/camera/aidl/android/hardware/CameraExtensionSessionStats.aidl
@@ -66,4 +66,9 @@
      * true if advanced extensions are being used, false otherwise
      */
     boolean isAdvanced = false;
+
+    /**
+     * Format of image capture request
+     */
+    int captureFormat;
 }
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