[Modern] Use dark primary color for ManageSpaceActivity

Use the old dark action bar color and status bar color for the
ManageSpaceActivity. On some versions of Android, a white icon is shown
in the ManageSpaceActivity task in Android recents. When the primary
activity color is white, this causes the icon to disappear.

BUG=871193

Change-Id: I6e5bd0c2fe59b64d20367b22254683a8998744c7
Reviewed-on: https://chromium-review.googlesource.com/1163830Reviewed-by: Becky Zhou <huayinz@chromium.org>
Commit-Queue: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581042}

chrome/android/java/AndroidManifest.xml

@@ -548,7 +548,7 @@ by a child template that "extends" this file.
             android:exported="false">
         </activity>
         <activity android:name="org.chromium.chrome.browser.preferences.website.ManageSpaceActivity"
-            android:theme="@style/PreferencesTheme"
+            android:theme="@style/ManageSpaceTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize"
             android:label="@string/storage_management_activity_label"
             android:exported="false">

chrome/android/java/res/values-v17/styles.xml

@@ -255,6 +255,16 @@
     </style>
 
     <!-- Manage Space Activity -->
+    <style name="ManageSpaceTheme" parent="PreferencesTheme">
+        <!-- Action bar color. This is intentionally a dark color. See crbug.com/871193. -->
+        <item name="colorPrimary">@color/dark_action_bar_color</item>
+        <!-- Status bar color -->
+        <item name="colorPrimaryDark">@color/dark_status_bar_color</item>
+        <item name="actionBarStyle">@style/ManageSpaceActionBarModern</item>
+    </style>
+    <style name="ManageSpaceActionBarModern" parent="PreferenceActionBarModern">
+        <item name="titleTextStyle">@style/WhiteHeadline1</item>
+    </style>
     <style name="ManageSpaceActivityButton">
       <item name="android:layout_width">wrap_content</item>
       <item name="android:layout_height">wrap_content</item>

chrome/android/java/res/values/colors.xml

@@ -27,6 +27,7 @@
 
     <!-- Other common colors -->
     <color name="dark_action_bar_color">#263238</color>
+    <color name="dark_status_bar_color">#161E21</color>
     <color name="modal_dialog_scrim_color">#7F000000</color>
 
     <!-- Modern color palette -->