Fixes crash when MuteList has e tags that are not valid hexes

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/HiddenAccountsFeedFilter.kt

@@ -20,9 +20,11 @@
  */
 package com.vitorpamplona.amethyst.ui.dal
 
+import android.util.Log
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.User
+import kotlinx.coroutines.CancellationException
 
 class HiddenAccountsFeedFilter(val account: Account) : FeedFilter<User>() {
     override fun feedKey(): String {
@@ -34,7 +36,15 @@ class HiddenAccountsFeedFilter(val account: Account) : FeedFilter<User>() {
     }
 
     override fun feed(): List<User> {
-        return account.flowHiddenUsers.value.hiddenUsers.reversed().map { LocalCache.getOrCreateUser(it) }
+        return account.flowHiddenUsers.value.hiddenUsers.reversed().mapNotNull {
+            try {
+                LocalCache.getOrCreateUser(it)
+            } catch (e: Exception) {
+                if (e is CancellationException) throw e
+                Log.e("HiddenAccountsFeedFilter", "Failed to parse key $it")
+                null
+            }
+        }
     }
 }