Fix the text color.

Bug: 5375784
Change-Id: I5307636b607f3e3a5e4afb34ece6f84320dc9cca
diff --git a/res/layout/android_beam.xml b/res/layout/android_beam.xml
index 03b9d40..e91ec50 100644
--- a/res/layout/android_beam.xml
+++ b/res/layout/android_beam.xml
@@ -37,7 +37,6 @@
                 android:gravity="top"
                 android:text="@string/android_beam_explained"
                 android:textAppearance="?android:attr/textAppearanceMedium"
-                android:textColor="?android:attr/textColorSecondary"
             />
             <ImageView android:id="@+id/android_beam_image"
                 android:layout_width="match_parent"