[FRE] Change the First Run Experience launching behavior

chrome/android/java/AndroidManifest.xml

Index: chrome/android/java/AndroidManifest.xml
diff --git a/chrome/android/java/AndroidManifest.xml b/chrome/android/java/AndroidManifest.xml
index 781267140c69ee5577e124cef3646028fc47f741..dbb8d4e3ed74468731bf43256698e074bb5c5b34 100644
--- a/chrome/android/java/AndroidManifest.xml
+++ b/chrome/android/java/AndroidManifest.xml
@@ -140,7 +140,8 @@ by a child template that "extends" this file.
             android:theme="@android:style/Theme.Translucent.NoTitleBar"
             android:relinquishTaskIdentity="true"
             android:taskAffinity=""
-            android:excludeFromRecents="true">
+            android:excludeFromRecents="true"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize">
         </activity>
         <activity-alias android:name="com.google.android.apps.chrome.Main"
             android:targetActivity="org.chromium.chrome.browser.document.ChromeLauncherActivity"
@@ -367,6 +368,7 @@ by a child template that "extends" this file.
         <activity android:name="org.chromium.chrome.browser.firstrun.LightweightFirstRunActivity"
             android:theme="@style/LightweightFreDialog"
             android:launchMode="singleTop"
+            android:autoRemoveFromRecents="true"
             android:windowSoftInputMode="stateHidden|adjustPan"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize">
         </activity>
@@ -374,6 +376,7 @@ by a child template that "extends" this file.
             android:theme="@style/DialogWhenLarge"
             android:label="@string/fre_label"
             android:launchMode="singleTop"
+            android:autoRemoveFromRecents="true"
             android:windowSoftInputMode="stateHidden|adjustPan"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize">
         </activity>