CompatibilityCheck: show unknown status when "secure element is not present"

Some devices "optimize" their OMAPI by reporting this status when both
slots are empty. Even just inserting one SIM would fix this error for
both slots.

In this case, we should not imply that the device is incompatible.

app-unpriv/src/main/java/im/angry/openeuicc/ui/CompatibilityCheckActivity.kt

@@ -64,6 +64,9 @@ class CompatibilityCheckActivity: AppCompatActivity() {
                 CompatibilityCheck.State.FAILURE -> {
                     root.findViewById<View>(R.id.compatibility_check_error).visibility = View.VISIBLE
                 }
+                CompatibilityCheck.State.FAILURE_UNKNOWN -> {
+                    root.findViewById<View>(R.id.compatibility_check_unknown).visibility = View.VISIBLE
+                }
                 else -> {
                     root.findViewById<View>(R.id.compatibility_check_progress_bar).visibility = View.VISIBLE
                 }

app-unpriv/src/main/java/im/angry/openeuicc/util/CompatibilityCheck.kt

@@ -9,6 +9,7 @@ import im.angry.easyeuicc.R
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.withContext
+import java.io.IOException
 
 fun getCompatibilityChecks(context: Context): List<CompatibilityCheck> =
     listOf(
@@ -38,6 +39,7 @@ abstract class CompatibilityCheck(context: Context) {
         NOT_STARTED,
         IN_PROGRESS,
         SUCCESS,
+        FAILURE_UNKNOWN, // The check technically failed, but no conclusion can be drawn
         FAILURE
     }
 
@@ -49,7 +51,7 @@ abstract class CompatibilityCheck(context: Context) {
 
     val description: String
         get() = when {
-            state == State.FAILURE && this::failureDescription.isInitialized -> failureDescription
+            (state == State.FAILURE || state == State.FAILURE_UNKNOWN) && this::failureDescription.isInitialized -> failureDescription
             else -> defaultDescription
         }
 
@@ -139,6 +141,14 @@ internal class IsdrChannelAccessCheck(private val context: Context): Compatibili
                 // ref: https://android.googlesource.com/platform/frameworks/base/+/4fe64fb4712a99d5da9c9a0eb8fd5169b252e1e1/omapi/java/android/se/omapi/Session.java#305
                 // SecurityException is only thrown when Channel is constructed, which means everything else needs to succeed
                 Pair(it.slotIndex, State.SUCCESS)
+            } catch (e: IOException) {
+                e.printStackTrace()
+                if (e.message?.contains("Secure Element is not present") == true) {
+                    failureDescription = context.getString(R.string.compatibility_check_isdr_channel_desc_unknown)
+                    Pair(it.slotIndex, State.FAILURE_UNKNOWN)
+                } else {
+                    Pair(it.slotIndex, State.FAILURE)
+                }
             } catch (e: Exception) {
                 e.printStackTrace()
                 Pair(it.slotIndex, State.FAILURE)

app-unpriv/src/main/res/drawable/ic_question_outline.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="?attr/colorControlNormal" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M11,18h2v-2h-2v2zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8zM12,6c-2.21,0 -4,1.79 -4,4h2c0,-1.1 0.9,-2 2,-2s2,0.9 2,2c0,2 -3,1.75 -3,5h2c0,-2.25 3,-2.5 3,-5 0,-2.21 -1.79,-4 -4,-4z"/>
+</vector>

app-unpriv/src/main/res/layout/compatibility_check_item.xml

@@ -60,6 +60,14 @@
             android:layout_width="32dp"
             android:layout_height="32dp" />
 
+        <ImageView
+            android:id="@+id/compatibility_check_unknown"
+            android:src="@drawable/ic_question_outline"
+            android:visibility="gone"
+            android:layout_gravity="center"
+            android:layout_width="32dp"
+            android:layout_height="32dp" />
+
     </FrameLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>

app-unpriv/src/main/res/values/strings.xml

@@ -13,6 +13,7 @@
     <string name="compatibility_check_omapi_connectivity_fail_sim_number">Only the following SIM slots are accessible via OMAPI: %s.</string>
     <string name="compatibility_check_isdr_channel">ISD-R Channel Access</string>
     <string name="compatibility_check_isdr_channel_desc">Does your device support opening an ISD-R (management) channel to eSIMs via OMAPI?</string>
+    <string name="compatibility_check_isdr_channel_desc_unknown">Cannot determine whether ISD-R access through OMAPI is supported. You might want to retry with SIM cards inserted (any SIM card will do) if not already.</string>
     <string name="compatibility_check_isdr_channel_desc_partial_fail">OMAPI access to ISD-R is only possible on the following SIM slots: %s.</string>
     <string name="compatibility_check_known_broken">Known Broken?</string>
     <string name="compatibility_check_known_broken_desc">Making sure your device is not known to have bugs associated with removable eSIMs.</string>