Fix 5044847: Minor tweaks to SecuritySettings.

Fix for 5044847 removes "Press menu for help" which is no longer used on any device.
Fix for 5092312 removes black background from pattern/pin/password settings.

Change-Id: I849ea0296aa9f0e9ace65086f9b154a961959f00

res/layout/choose_lock_password.xml

@@ -20,7 +20,6 @@
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical"
-    android:background="@android:color/background_dark"
     android:gravity="center_horizontal">
 
     <!-- header text ('Enter Pin') -->

res/layout/choose_lock_pattern.xml

@@ -18,8 +18,7 @@
     android:id="@+id/topLayout"
     android:orientation="vertical"
     android:layout_width="wrap_content"
-    android:layout_height="match_parent"
-    android:background="@color/black">
+    android:layout_height="match_parent">
 
     <!-- takes up all space above button bar at bottom -->
     <LinearLayout

res/layout/confirm_lock_pattern.xml

@@ -18,8 +18,7 @@
     android:id="@+id/topLayout"
     android:orientation="vertical"
     android:layout_width="wrap_content"
-    android:layout_height="match_parent"
-    android:background="@color/black">
+    android:layout_height="match_parent">
 
     <TextView android:id="@+id/headerText"
         android:layout_width="match_parent"

src/com/android/settings/ChooseLockPattern.java

@@ -235,7 +235,7 @@ public class ChooseLockPattern extends PreferenceActivity {
             Introduction(
                     R.string.lockpattern_recording_intro_header,
                     LeftButtonMode.Cancel, RightButtonMode.ContinueDisabled,
-                    R.string.lockpattern_recording_intro_footer, true),
+                    ID_EMPTY_MESSAGE, true),
             HelpScreen(
                     R.string.lockpattern_settings_help_how_to_record,
                     LeftButtonMode.Gone, RightButtonMode.Ok, ID_EMPTY_MESSAGE, false),