Tint app menu icon color in dark mode

Previously we tint icon mixing with original color in dark mode, this
CL will throw out the original color and tint the icons.

Bug: 1126477
Change-Id: Ie9f96f9387a0084004684036dd842465171d442d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404440Reviewed-by: Theresa  <twellington@chromium.org>
Reviewed-by: Gang Wu <gangwu@chromium.org>
Commit-Queue: Gang Wu <gangwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805899}

chrome/android/java/res/layout/incognito_menu_item.xml

@@ -21,6 +21,7 @@
         android:text="@string/menu_new_incognito_tab"
         android:drawablePadding="12dp"
         app:chromeDrawableTint="@color/default_icon_color_secondary"
+        android:tintMode="src_in"
         app:drawableWidth="24dp"
         app:drawableHeight="24dp"/>
 

chrome/android/java/res/layout/managed_by_menu_item.xml

@@ -27,6 +27,7 @@
         android:drawableStart="@drawable/ic_business"
         android:drawablePadding="12dp"
         app:chromeDrawableTint="@color/default_icon_color_secondary"
+        android:tintMode="src_in"
         app:drawableWidth="20dp"
         app:drawableHeight="20dp"/>
 

chrome/browser/ui/android/appmenu/internal/java/res/layout/menu_item_start_with_icon.xml

@@ -17,7 +17,8 @@
         android:layout_width="24dp"
         android:layout_height="24dp"
         android:gravity="center_vertical"
-        android:tint="@color/default_icon_color_secondary" />
+        android:tint="@color/default_icon_color_secondary"
+        android:tintMode="src_in" />
 
     <TextView
         android:id="@+id/menu_item_text"

chrome/browser/ui/android/appmenu/internal/java/res/layout/title_button_menu_item.xml

@@ -30,6 +30,7 @@
         android:paddingStart="16dp"
         android:drawablePadding="12dp"
         app:chromeDrawableTint="@color/default_icon_color_secondary"
+        android:tintMode="src_in"
         app:drawableWidth="24dp"
         app:drawableHeight="24dp" />