VmTerminalApp: Implement error activity

Screenshot is attached to the bug

Bug: 376796062
Test: Manually. Also checked that back key on error activity doesn't \
go back to the main activity.

Change-Id: I82713b130a9d25b673b9c9b984077a0d55e4cd92
diff --git a/android/TerminalApp/AndroidManifest.xml b/android/TerminalApp/AndroidManifest.xml
index 1af6c8a..b74b8b0 100644
--- a/android/TerminalApp/AndroidManifest.xml
+++ b/android/TerminalApp/AndroidManifest.xml
@@ -46,14 +46,11 @@
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>
-        <activity android:name=".SettingsActivity">
-        </activity>
-        <activity android:name=".SettingsDiskResizeActivity">
-        </activity>
-        <activity android:name=".SettingsPortForwardingActivity">
-        </activity>
-        <activity android:name=".SettingsRecoveryActivity">
-        </activity>
+        <activity android:name=".SettingsActivity" />
+        <activity android:name=".SettingsDiskResizeActivity" />
+        <activity android:name=".SettingsPortForwardingActivity" />
+        <activity android:name=".SettingsRecoveryActivity" />
+        <activity android:name=".ErrorActivity" />
         <property
             android:name="android.window.PROPERTY_ACTIVITY_EMBEDDING_SPLITS_ENABLED"
             android:value="true" />