Clean up TelephonyManager channels in case of a forced restart

app/src/main/java/im/angry/openeuicc/OpenEuiccApplication.kt

@@ -3,6 +3,8 @@ package im.angry.openeuicc
 import android.app.Application
 import android.telephony.TelephonyManager
 import im.angry.openeuicc.core.EuiccChannelManager
+import im.angry.openeuicc.util.*
+import java.lang.Exception
 
 class OpenEuiccApplication : Application() {
     val telephonyManager by lazy {
@@ -12,4 +14,19 @@ class OpenEuiccApplication : Application() {
     val euiccChannelManager by lazy {
         EuiccChannelManager(this)
     }
+
+    override fun onCreate() {
+        super.onCreate()
+        // Clean up channels left open in TelephonyManager
+        // due to a (potentially) forced restart
+        for (slotId in 0 until EuiccChannelManager.MAX_SIMS) {
+            for (channel in 0 until 10) {
+                try {
+                    telephonyManager.iccCloseLogicalChannelBySlot(slotId, channel)
+                } catch (_: Exception) {
+                    // We do not care
+                }
+            }
+        }
+    }
 }

app/src/main/java/im/angry/openeuicc/core/TelephonyManagerApduChannel.kt

@@ -21,8 +21,6 @@ class TelephonyManagerApduChannel(
         // TODO: On Tiramisu, we need to specify the portId also if we want MEP support
         fun tryConnectUiccSlot(tm: TelephonyManager, slotId: Int): Pair<ApduChannel, EuiccChannelStateManager>? {
             try {
-                // FIXME: Clean up previously opened channels across restarts
-                tm.iccCloseLogicalChannelBySlot(slotId, 1)
                 val channel = tm.iccOpenLogicalChannelBySlot(slotId, EUICC_APP_ID, 0)
                 if (channel.status != STATUS_NO_ERROR || channel.channel == INVALID_CHANNEL) {
                     Log.e(TAG, "Unable to open eUICC channel for slot ${slotId} via TelephonyManager: ${channel.status}")