Improve message processing performance.

app/src/main/java/org/thoughtcrime/securesms/database/SignalDatabase.kt

@@ -385,6 +385,22 @@ open class SignalDatabase(private val context: Application, databaseSecret: Data
       }
     }
 
+    /**
+     * Mirrors [runInTransaction] but instead of returning the result of calling block it returns
+     * whether the transaction completed successfully.
+     */
+    @JvmStatic
+    fun tryRunInTransaction(block: (SignalSQLiteDatabase) -> Unit): Boolean {
+      var committed = false
+
+      instance!!.signalWritableDatabase.withinTransaction {
+        block(it)
+        it.runPostSuccessfulTransaction { committed = true }
+      }
+
+      return committed
+    }
+
     @get:JvmStatic
     @get:JvmName("attachments")
     val attachments: AttachmentTable