Don't trampoline twice when opening security or privacy

Settings already trampolines to a two-pane version of deeplink
activities, doing another trampoline will wind up creating a second task
covering up the first, with the wrong layout.

Bug: 253554698
Test: manually
Change-Id: Ib7ba5c95cac2f644ade37a41f321d11c8f1d1b89

src/com/android/settings/Settings.java

@@ -152,6 +152,11 @@ public class Settings extends SettingsActivity {
         /** Redirects to SafetyCenter if enabled. */
         @VisibleForTesting
         public void handleSafetyCenterRedirection() {
+            if (isFinishing()) {
+                // Don't trampoline if already exiting this activity.
+                return;
+            }
+
             if (SafetyCenterManagerWrapper.get().isEnabled(this)) {
                 try {
                     startActivity(new Intent(Intent.ACTION_SAFETY_CENTER));
@@ -213,6 +218,11 @@ public class Settings extends SettingsActivity {
         /** Redirects to SafetyCenter if enabled. */
         @VisibleForTesting
         public void handleSafetyCenterRedirection() {
+            if (isFinishing()) {
+                // Don't trampoline if already exiting this activity.
+                return;
+            }
+
             if (ACTION_PRIVACY_SETTINGS.equals(getIntent().getAction())
                     && SafetyCenterManagerWrapper.get().isEnabled(this)) {
                 try {