Fixed PIN display, including in Arabic.

Bug 5731093

Replace TextView by EditText to make it cleaner.
Had to force the text color, although the TextAppearance should
handle it. Maybe something is wrong with the theme.

Also added a hint for consistency.

Change-Id: Icd7170a0ef3757d0313e0799873f2dd375b02f2f

Author: Gilles Debunne

core/res/res/layout-sw600dp/keyguard_screen_sim_pin_portrait.xml

@@ -57,12 +57,13 @@
             android:background="@android:drawable/edit_text">
 
             <!-- displays dots as user enters pin -->
-            <TextView android:id="@+id/pinDisplay"
+            <EditText android:id="@+id/pinDisplay"
                 android:layout_width="0dip"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:maxLines="1"
                 android:textAppearance="?android:attr/textAppearanceLargeInverse"
+                android:textColor="@android:color/primary_text_holo_light"
                 android:textStyle="bold"
                 android:inputType="textPassword"
             />

core/res/res/layout/keyguard_screen_sim_pin_portrait.xml

@@ -57,12 +57,13 @@
             android:background="@android:drawable/edit_text">
 
             <!-- displays dots as user enters pin -->
-            <TextView android:id="@+id/pinDisplay"
+            <EditText android:id="@+id/pinDisplay"
                 android:layout_width="0dip"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:maxLines="1"
                 android:textAppearance="?android:attr/textAppearanceLargeInverse"
+                android:textColor="@android:color/primary_text_holo_light"
                 android:textStyle="bold"
                 android:inputType="textPassword"
             />

core/res/res/layout/keyguard_screen_sim_puk_landscape.xml

@@ -122,14 +122,16 @@
                       android:background="@android:drawable/edit_text">
 
                       <!-- displays dots as user enters new pin -->
-                      <TextView android:id="@+id/pinDisplay"
+                      <EditText android:id="@+id/pinDisplay"
                           android:layout_width="0dip"
                           android:layout_height="wrap_content"
                           android:layout_weight="1"
                           android:maxLines="1"
                           android:textAppearance="?android:attr/textAppearanceLargeInverse"
+                          android:textColor="@android:color/primary_text_holo_light"
                           android:textStyle="bold"
                           android:inputType="textPassword"
+                          android:hint="@android:string/keyguard_password_enter_pin_prompt"
                       />
 
                       <ImageButton android:id="@+id/pinDel"