[F] Fix settings back button

app/src/main/java/org/hydev/wearsync/ActivitySettings.kt

@@ -1,6 +1,7 @@
 package org.hydev.wearsync
 
 import android.os.Bundle
+import android.view.MenuItem
 import androidx.appcompat.app.AppCompatActivity
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
@@ -25,6 +26,16 @@ class ActivitySettings : AppCompatActivity()
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
     }
 
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return when (item.itemId) {
+            android.R.id.home -> {
+                finish()
+                true
+            }
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+
     class SettingsFragment : PreferenceFragmentCompat()
     {
         val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)

app/src/main/java/org/hydev/wearsync/bles/BluetoothHandler.kt

@@ -13,7 +13,7 @@ import java.util.*
 
 internal class BluetoothHandler private constructor(context: Context) {
     private var currentTimeCounter = 0
-    val batteryChannel = Channel<UInt>(UNLIMITED)
+    val batteryChannel = Channel<BatteryMeasurement>(UNLIMITED)
     val heartRateChannel = Channel<HeartRateMeasurement>(UNLIMITED)
     val bloodPressureChannel = Channel<BloodPressureMeasurement>(UNLIMITED)
     val glucoseChannel = Channel<GlucoseMeasurement>(UNLIMITED)