clear listeners after disabling flash for SOS and stroboscope

- this prevents the two sliders for brightness and stroboscope from showing up at the same time

app/src/main/kotlin/com/simplemobiletools/flashlight/helpers/MyCameraImpl.kt

@@ -49,7 +49,6 @@ class MyCameraImpl private constructor(val context: Context, private var cameraT
 
     fun toggleStroboscope(): Boolean {
         handleCameraSetup()
-        cameraFlash!!.unregisterListeners()
 
         if (isSOSRunning) {
             stopSOS()
@@ -62,6 +61,8 @@ class MyCameraImpl private constructor(val context: Context, private var cameraT
             disableFlashlight()
         }
 
+        cameraFlash!!.unregisterListeners()
+
         if (!tryInitCamera()) {
             return false
         }
@@ -82,7 +83,6 @@ class MyCameraImpl private constructor(val context: Context, private var cameraT
 
     fun toggleSOS(): Boolean {
         handleCameraSetup()
-        cameraFlash!!.unregisterListeners()
 
         if (isStroboscopeRunning) {
             stopStroboscope()
@@ -103,6 +103,8 @@ class MyCameraImpl private constructor(val context: Context, private var cameraT
             disableFlashlight()
         }
 
+        cameraFlash!!.unregisterListeners()
+
         return if (isSOSRunning) {
             stopSOS()
             false