Show category when search "Mobile data"

The displayed category is "SIMs".

Bug: 346776183
Flag: EXEMPT bug fix
Test: manual - search "Mobile data"
Test: unit test
Change-Id: If3c395281e96603193e7476a9e76d1f9e9213531
diff --git a/protos/spa_search_landing.proto b/protos/spa_search_landing.proto
new file mode 100644
index 0000000..4305554
--- /dev/null
+++ b/protos/spa_search_landing.proto
@@ -0,0 +1,14 @@
+syntax = "proto2";
+
+package com.android.settings.spa;
+
+message SpaSearchLandingKey {
+  oneof page {
+    SpaSearchLandingSpaPage spa_page = 1;
+  }
+}
+
+message SpaSearchLandingSpaPage {
+  /** The destination of SPA page. */
+  optional string destination = 1;
+}