use the call's details to calculate the call duration

app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallDurationHelper.kt

@@ -1,34 +0,0 @@
-package com.simplemobiletools.dialer.helpers
-
-import java.util.Timer
-import java.util.TimerTask
-
-class CallDurationHelper {
-    private var callTimer: Timer? = null
-    private var callDuration = 0
-    private var callback: ((durationSecs: Int) -> Unit)? = null
-
-    fun onDurationChange(callback: (durationSecs: Int) -> Unit) {
-        this.callback = callback
-    }
-
-    fun start() {
-        try {
-            callDuration = 0
-            callTimer = Timer()
-            callTimer?.scheduleAtFixedRate(getTimerUpdateTask(), 1000, 1000)
-        } catch (ignored: Exception) {
-        }
-    }
-
-    fun cancel() {
-        callTimer?.cancel()
-    }
-
-    private fun getTimerUpdateTask() = object : TimerTask() {
-        override fun run() {
-            callDuration++
-            callback?.invoke(callDuration)
-        }
-    }
-}

app/src/main/kotlin/com/simplemobiletools/dialer/helpers/CallManager.kt

@@ -104,5 +104,13 @@ class CallManager {
                 }
             }
         }
+
+        fun getCallDuration(): Int {
+            return if (call != null) {
+                ((System.currentTimeMillis() - call!!.details.connectTimeMillis) / 1000).toInt()
+            } else {
+                0
+            }
+        }
     }
 }