Android: escape SQL LIKE wildcards in contacts search query

The contacts search passed user input directly into a LIKE pattern
without escaping % and _ characters, causing them to act as SQL
wildcards and return incorrect results.

Add an escapeLikePattern() helper that escapes \, %, and _ with a
backslash, and add ESCAPE '\' to the selection clause so SQLite
treats them as literal characters.

Made-with: Cursor

apps/android/app/src/main/java/ai/openclaw/app/node/ContactsHandler.kt

@@ -76,8 +76,8 @@ private object SystemContactsDataSource : ContactsDataSource {
       selection = null
       selectionArgs = null
     } else {
-      selection = "${ContactsContract.Contacts.DISPLAY_NAME_PRIMARY} LIKE ?"
-      selectionArgs = arrayOf("%${request.query}%")
+      selection = "${ContactsContract.Contacts.DISPLAY_NAME_PRIMARY} LIKE ? ESCAPE '\\'"
+      selectionArgs = arrayOf("%${escapeLikePattern(request.query)}%")
     }
     val sortOrder = "${ContactsContract.Contacts.DISPLAY_NAME_PRIMARY} COLLATE NOCASE ASC LIMIT ${request.limit}"
     resolver.query(
@@ -247,6 +247,9 @@ private object SystemContactsDataSource : ContactsDataSource {
     }
   }
 
+  private fun escapeLikePattern(pattern: String): String =
+    pattern.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
+
   private fun loadPhones(resolver: ContentResolver, contactId: Long): List<String> {
     return queryContactValues(
       resolver = resolver,