Dump settings to log when file logging is enabled

ultrasonic/src/main/kotlin/org/moire/ultrasonic/app/UApp.kt

@@ -59,6 +59,7 @@ class UApp : MultiDexApplication() {
         ioScope.launch {
             if (Settings.debugLogToFile) {
                 FileLoggerTree.plantToTimberForest()
+                Util.dumpSettingsToLog()
             }
             isFirstRun = Util.isFirstRun()
         }

ultrasonic/src/main/kotlin/org/moire/ultrasonic/util/Util.kt

@@ -775,4 +775,13 @@ object Util {
             stopForeground(true)
         }
     }
+
+    fun dumpSettingsToLog() {
+        Timber.d("Current user preferences")
+        Timber.d("========================")
+        val keys = Settings.preferences.all
+        keys.forEach {
+            Timber.d("${it.key}: ${it.value}")
+        }
+    }
 }