Decrease drop target left and right padding.

Otherwise it looks like we are aggressively truncating the
text even though there is plenty of room to show it.

Bug: 31790418
Change-Id: Ia1cdc232f05815732d4cb95b954e935724a200fd
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 87a5629..cd06b75 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -101,8 +101,8 @@
     <!-- Drop targets -->
     <style name="DropTargetButtonBase">
         <item name="android:drawablePadding">7.5dp</item>
-        <item name="android:paddingLeft">25dp</item>
-        <item name="android:paddingRight">25dp</item>
+        <item name="android:paddingLeft">16dp</item>
+        <item name="android:paddingRight">16dp</item>
         <item name="android:textColor">#FFFFFFFF</item>
         <item name="android:textSize">@dimen/drop_target_text_size</item>
         <item name="android:singleLine">true</item>