Standardize Launch URL to Kabuki Home (#5148)

1. Ensuring Cobalt launches with the Kabuki home page URL even with
intent deep links. Kabuki is now solely responsible for consuming and
navigating to the deep link destination.
2. Removes the Android Activity's preservation of the last viewed URL
(ACTIVE_SHELL_URL_KEY). Kabuki should manage this state internally if
needed.

b/405227449

Co-authored-by: Colin Liang <colinliang@google.com>

Author: zhongqiliang

cobalt/android/apk/app/src/main/java/dev/cobalt/coat/CobaltActivity.java

@@ -68,7 +68,6 @@ public abstract class CobaltActivity extends Activity {
   private static final String URL_ARG = "--url=";
   private static final java.lang.String META_DATA_APP_URL = "cobalt.APP_URL";
 
-  private static final String ACTIVE_SHELL_URL_KEY = "activeUrl";
   public static final String COMMAND_LINE_ARGS_KEY = "commandLineArgs";
 
   private static final Pattern URL_PARAM_PATTERN = Pattern.compile("^[a-zA-Z0-9_=]*$");
@@ -186,9 +185,6 @@ protected void createContent(final Bundle savedInstanceState) {
     mWindowAndroid.setAnimationPlaceholderView(
         mShellManager.getContentViewRenderView().getSurfaceView());
 
-    if (mStartupUrl == null || mStartupUrl.isEmpty()) {
-      mStartupUrl = getUrlFromIntent(getIntent());
-    }
     if (mStartupUrl == null || mStartupUrl.isEmpty()) {
       String[] args = getStarboardBridge().getArgs();
       mStartupUrl =
@@ -226,16 +222,6 @@ public void onFailure() {
 
   // Initially copied from ContentShellActiviy.java
   private void finishInitialization(Bundle savedInstanceState) {
-    String shellUrl;
-    if (!TextUtils.isEmpty(mStartupUrl)) {
-      shellUrl = mStartupUrl;
-    } else {
-      shellUrl = ShellManager.DEFAULT_SHELL_URL;
-    }
-
-    if (savedInstanceState != null && savedInstanceState.containsKey(ACTIVE_SHELL_URL_KEY)) {
-      shellUrl = savedInstanceState.getString(ACTIVE_SHELL_URL_KEY);
-    }
     // Set to overlay video mode.
     mShellManager.getContentViewRenderView().setOverlayVideoMode(true);
 
@@ -246,8 +232,8 @@ private void finishInitialization(Bundle savedInstanceState) {
     getStarboardBridge().setWebContents(getActiveWebContents());
 
     // Load the `url` with the same shell we created above.
-    Log.i(TAG, "shellManager load url:" + shellUrl);
-    mShellManager.getActiveShell().loadUrl(shellUrl);
+    Log.i(TAG, "shellManager load url:" + mStartupUrl);
+    mShellManager.getActiveShell().loadUrl(mStartupUrl);
   }
 
   // Initially copied from ContentShellActiviy.java
@@ -259,19 +245,6 @@ private void initializationFailed() {
     finish();
   }
 
-  // Initially copied from ContentShellActiviy.java
-  @Override
-  protected void onSaveInstanceState(Bundle outState) {
-    super.onSaveInstanceState(outState);
-    WebContents webContents = getActiveWebContents();
-    if (webContents != null) {
-      // TODO(yfriedman): crbug/783819 - This should use GURL serialize/deserialize.
-      outState.putString(ACTIVE_SHELL_URL_KEY, webContents.getLastCommittedUrl().getSpec());
-    }
-
-    mIntentRequestTracker.saveInstanceState(outState);
-  }
-
   protected static Optional<KeyEvent> getRemappedKeyEvent(int keyCode, int action) {
     int mappedKeyCode;
     if (keyCode == KeyEvent.KEYCODE_BACK) {