Minor fixes to match VTS requirements:

* Add missing camera characteristic metadata entries required by VTS
* Do not fail for VIDEO_SNAPSHOT template in constructDefaultRequestSettings.

Bug: 301023410
Test: atest VtsAidlHalCameraProvider_TargetTest (with manually added
virutal camera provider)
Test: atest virtual_camera_tests

Change-Id: I86fee06d67b16f8155b47d0deb4c217c8f8e5698
diff --git a/services/camera/virtualcamera/util/MetadataBuilder.cc b/services/camera/virtualcamera/util/MetadataBuilder.cc
index fb06e31..b3b1a26 100644
--- a/services/camera/virtualcamera/util/MetadataBuilder.cc
+++ b/services/camera/virtualcamera/util/MetadataBuilder.cc
@@ -95,6 +95,14 @@
   return *this;
 }
 
+MetadataBuilder& MetadataBuilder::setControlAvailableModes(
+    const std::vector<camera_metadata_enum_android_control_mode_t>&
+        availableModes) {
+  mEntryMap[ANDROID_CONTROL_AVAILABLE_MODES] =
+      convertTo<uint8_t>(availableModes);
+  return *this;
+}
+
 MetadataBuilder& MetadataBuilder::setControlAfAvailableModes(
     const std::vector<camera_metadata_enum_android_control_af_mode_t>&
         availableModes) {