[SRO] Fixing the color tint list for default icon -- removing icon pressed alpha

Color tint list for dark theme is behaving differently when:
- selected
- focused
- pressed
- activated

Fix is to remove the alpha from these states.

Bug: 927145
Change-Id: Ifc5409b85135e58c236a57f06432920e8134155d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2218494Reviewed-by: Lijin Shen <lazzzis@google.com>
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Filip Gorski <fgorski@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775239}

components/browser_ui/styles/android/java/res/color/default_icon_color_light_tint_list.xml

@@ -8,15 +8,11 @@
 <selector xmlns:android="http://schemas.android.com/apk/res/android"
           xmlns:tools="http://schemas.android.com/tools"
           tools:ignore="UnusedResources">
-    <item android:alpha="@dimen/default_icon_pressed_alpha"
-          android:state_selected="true" android:color="@color/default_icon_color_light" />
-    <item android:alpha="@dimen/default_icon_pressed_alpha"
-          android:state_focused="true" android:color="@color/default_icon_color_light" />
-    <item android:alpha="@dimen/default_icon_pressed_alpha"
-          android:state_pressed="true" android:color="@color/default_icon_color_light" />
-    <item android:alpha="@dimen/default_icon_pressed_alpha"
-          android:state_activated="true" android:color="@color/default_icon_color_light" />
     <item android:alpha="@dimen/default_disabled_alpha"
           android:state_enabled="false" android:color="@color/default_icon_color_light" />
+    <item android:state_selected="true" android:color="@color/default_icon_color_light" />
+    <item android:state_focused="true" android:color="@color/default_icon_color_light" />
+    <item android:state_pressed="true" android:color="@color/default_icon_color_light" />
+    <item android:state_activated="true" android:color="@color/default_icon_color_light" />
     <item android:color="@color/default_icon_color_light" />
 </selector>