[Assistant Voice Search] Fix colorful mic reverting to grey

When returning to the NTP after native is initialized, the native init
observer registration has no effect. This adds a check to for this
and triggers the colorful mic behavior immediately if native is already
initialized.

Bug: 1052073
Change-Id: I229ddebb16ddeb418219275874552e54fb64646e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2055389
Commit-Queue: Brandon Wylie <wylieb@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742303}

chrome/android/java/src/org/chromium/chrome/browser/init/ActivityLifecycleDispatcherImpl.java

@@ -45,6 +45,7 @@ public class ActivityLifecycleDispatcherImpl implements ActivityLifecycleDispatc
             new ObserverList<>();
 
     private @ActivityState int mActivityState = ActivityState.DESTROYED;
+    private boolean mIsNativeInitialized;
 
     @Override
     public void register(LifecycleObserver observer) {
@@ -115,6 +116,11 @@ public class ActivityLifecycleDispatcherImpl implements ActivityLifecycleDispatc
         return mActivityState;
     }
 
+    @Override
+    public boolean isNativeInitializationFinished() {
+        return mIsNativeInitialized;
+    }
+
     void dispatchPreInflationStartup() {
         for (InflationObserver observer : mInflationObservers) {
             observer.onPreInflationStartup();
@@ -160,6 +166,7 @@ public class ActivityLifecycleDispatcherImpl implements ActivityLifecycleDispatc
     }
 
     void dispatchNativeInitializationFinished() {
+        mIsNativeInitialized = true;
         for (NativeInitObserver observer : mNativeInitObservers) {
             observer.onFinishNativeInitialization();
         }

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageLayout.java

@@ -933,6 +933,9 @@ public class NewTabPageLayout extends LinearLayout implements TileGroup.Observer
         public void initialize(ActivityLifecycleDispatcher activityLifecycleDispatcher) {
             mActivityLifecycleDispatcher = activityLifecycleDispatcher;
             mActivityLifecycleDispatcher.register(this);
+            if (mActivityLifecycleDispatcher.isNativeInitializationFinished()) {
+                onFinishNativeInitialization();
+            }
         }
 
         @Override

chrome/browser/ui/android/appmenu/internal/java/src/org/chromium/chrome/browser/ui/appmenu/AppMenuTest.java

@@ -683,6 +683,11 @@ public class AppMenuTest extends DummyUiActivityTestCase {
         public int getCurrentActivityState() {
             return 0;
         }
+
+        @Override
+        public boolean isNativeInitializationFinished() {
+            return false;
+        }
     }
 
     private class TestMenuButtonDelegate implements MenuButtonDelegate {

chrome/lib/lifecycle/public/android/java/src/org/chromium/chrome/browser/lifecycle/ActivityLifecycleDispatcher.java

@@ -71,4 +71,7 @@ public interface ActivityLifecycleDispatcher {
      */
     @ActivityState
     int getCurrentActivityState();
+
+    /** @return Whether native initialization is complete. */
+    boolean isNativeInitializationFinished();
 }