Removed an extraneous messge when pairing.

+ When two devices are executing Bluetooth simply pairing, which does
not need keyboard input, the message "Type the pairing code then press
Return or Enter." has been removed.
+ Note that in legacy pairing the message to type in the pairing key
should remain even if the user is only verifying the key.  The reason is
that we are not able to guarantee the other device does not have to input
the key.
+ Also updated pin entry to Material/Quantum specification.

Bug: 17400402
Change-Id: I7853fa13835f7f60d0e71102de9a079708f3544e

res/layout/bluetooth_pin_confirm.xml

@@ -24,6 +24,7 @@
 
     <LinearLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
+        android:paddingStart="16dip"
         android:layout_height="match_parent"
         android:layout_width="match_parent"
         android:orientation="vertical">

res/layout/bluetooth_pin_entry.xml

@@ -84,7 +84,8 @@
             android:layout_marginStart="@dimen/bluetooth_dialog_padding"
             android:layout_marginEnd="@dimen/bluetooth_dialog_padding"
             android:gravity="center_vertical"
-            android:textAppearance="?android:attr/textAppearanceMedium" />
+            android:textAppearance="@android:style/TextAppearance.Material.Subhead"
+            android:textColor="@*android:color/secondary_text_material_light"/>
 
         <TextView
             android:id="@+id/phonebook_sharing_message"

src/com/android/settings/bluetooth/BluetoothPairingDialog.java

@@ -235,6 +235,7 @@ public final class BluetoothPairingDialog extends AlertActivity implements
         switch (mType) {
             case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY:
             case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN:
+                messagePairing.setVisibility(View.VISIBLE);
             case BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION:
                 messageCaption = getString(R.string.bluetooth_enter_pin_msg);
                 pairingContent = mPairingKey;
@@ -242,6 +243,7 @@ public final class BluetoothPairingDialog extends AlertActivity implements
 
             case BluetoothDevice.PAIRING_VARIANT_CONSENT:
             case BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT:
+                messagePairing.setVisibility(View.VISIBLE);
                 messageCaption = getString(R.string.bluetooth_enter_pin_msg);
                 break;
 
@@ -259,7 +261,6 @@ public final class BluetoothPairingDialog extends AlertActivity implements
             pairingViewCaption.setVisibility(View.VISIBLE);
             pairingViewContent.setVisibility(View.VISIBLE);
             pairingViewContent.setText(pairingContent);
-            messagePairing.setVisibility(View.VISIBLE);
         }
 
         return view;