Contaminant detection notification

Bug: 119642987
Bug: 117330206
Bug: 77606903

Test: Manually tested for contaminant notification to show up
Change-Id: If22215df1e6127aa67190f72328fbc32b9477bc2
diff --git a/proto/src/system_messages.proto b/proto/src/system_messages.proto
index 6ff2b35..f128d86 100644
--- a/proto/src/system_messages.proto
+++ b/proto/src/system_messages.proto
@@ -220,6 +220,12 @@
     // Package: android
     NOTE_NETWORK_SUGGESTION_AVAILABLE = 51;
 
+    // Inform the user that the contaminant is detected on the USB port
+    NOTE_USB_CONTAMINANT_DETECTED = 52;
+
+    // Inform that user that the USB port is free of contaminants.
+    NOTE_USB_CONTAMINANT_NOT_DETECTED = 53;
+
     // ADD_NEW_IDS_ABOVE_THIS_LINE
     // Legacy IDs with arbitrary values appear below
     // Legacy IDs existed as stable non-conflicting constants prior to the O release