Overview - update Clear All and Empty message drawing

Update Clear All and Empty message to use primary color, not workspace
color, as they are drawn on floating background now, not wallpaper.

Bug: 184260454
Fixes: 184260454
Test: local build, flash and run
Change-Id: Ie8ef4b7ace3053c2068a27b7cbedbbb039fc36d8
diff --git a/quickstep/res/layout/overview_clear_all_button.xml b/quickstep/res/layout/overview_clear_all_button.xml
index c61610a..1ee726e 100644
--- a/quickstep/res/layout/overview_clear_all_button.xml
+++ b/quickstep/res/layout/overview_clear_all_button.xml
@@ -21,5 +21,5 @@
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="@string/recents_clear_all"
-    android:textColor="?attr/workspaceTextColor"
+    android:textColor="?android:attr/textColorPrimary"
     android:textSize="14sp" />
\ No newline at end of file
diff --git a/quickstep/res/layout/overview_panel.xml b/quickstep/res/layout/overview_panel.xml
index 394e880..34b7ee3 100644
--- a/quickstep/res/layout/overview_panel.xml
+++ b/quickstep/res/layout/overview_panel.xml
@@ -30,7 +30,6 @@
         android:accessibilityPaneTitle="@string/accessibility_recent_apps"
         android:clipChildren="false"
         android:clipToPadding="false"
-        android:theme="@style/HomeScreenElementTheme"
         android:visibility="invisible" />
 
     <include
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index b62a029..3c171fe 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -559,6 +559,7 @@
                 .getDimension(R.dimen.recents_empty_message_text_size));
         mEmptyMessagePaint.setTypeface(Typeface.create(Themes.getDefaultBodyFont(context),
                 Typeface.NORMAL));
+        mEmptyMessagePaint.setAntiAlias(true);
         mEmptyMessagePadding = getResources()
                 .getDimensionPixelSize(R.dimen.recents_empty_message_text_padding);
         setWillNotDraw(false);