Fix various compiler warnings.

app/src/main/java/org/thoughtcrime/securesms/keyvalue/AccountValues.kt

@@ -310,7 +310,7 @@ internal class AccountValues internal constructor(store: KeyValueStore) : Signal
     }
 
     if (previous && !registered) {
-      clearLocalCredentials(ApplicationDependencies.getApplication())
+      clearLocalCredentials()
     }
   }
 
@@ -329,7 +329,7 @@ internal class AccountValues internal constructor(store: KeyValueStore) : Signal
   val isLinkedDevice: Boolean
     get() = !isPrimaryDevice
 
-  private fun clearLocalCredentials(context: Context) {
+  private fun clearLocalCredentials() {
     putString(KEY_SERVICE_PASSWORD, Util.getSecret(18))
 
     val newProfileKey = ProfileKeyUtil.createNew()

app/src/main/java/org/thoughtcrime/securesms/keyvalue/SignalStoreValueDelegates.kt

@@ -70,6 +70,7 @@ private class BooleanValue(private val key: String, private val default: Boolean
 
 private class StringValue<T : String?>(private val key: String, private val default: T, store: KeyValueStore) : SignalStoreValueDelegate<T>(store) {
   override fun getValue(values: KeyValueStore): T {
+    @Suppress("UNCHECKED_CAST")
     return values.getString(key, default) as T
   }