Workaround for back press through SIM Missing page

Make sure the prior activity (NetworkSetupActivity) knows that back was
pressed - as it must have been - when the user returns to it. Otherwise,
the wizard gets stuck on a "Just a sec" page forever.

Change-Id: I35f7a78c4decc13b9dee267bfaf195fb2241395d

src/org/lineageos/setupwizard/SimMissingActivity.java

@@ -20,7 +20,16 @@ public class SimMissingActivity extends BaseSetupWizardActivity {
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         if (!SetupWizardUtils.simMissing(this) || !SetupWizardUtils.hasTelephony(this)) {
-            finishAction(RESULT_SKIP);
+            // NetworkSetupActivity comes before us. DateTimeActivity comes after.
+            // If the user presses the back button on DateTimeActivity, we can only pass along
+            // that information to NetworkSetupActivity if we are still around. But if we finish
+            // here, we're gone, and NetworkSetupActivity will get whatever result we give here.
+            // We can't predict the future, but we can reasonably assume that the only way for
+            // NetworkSetupActivity to be reached later is if the user went backwards. So, we
+            // finish this activity faking that the user pressed the back button, which is required
+            // for subactivities like NetworkSetupActivity to work properly on backward navigation.
+            // TODO: Resolve all this.
+            finishAction(RESULT_SKIP, new Intent().putExtra("onBackPressed", true));
             return;
         }
         getGlifLayout().setDescriptionText(getString(R.string.sim_missing_summary));