Use the CalculatorEditTextField everywhere.

That way, tablet and phone act the same.
Also, Fixes bug:5215768 IRK56: Selected text in Calculator is left-aligned, but selection handles are right-aligned

By giving the user the same "tap and hold to copy" behavior that tablet has
Which also allows them to put the cursor anywhere in the field and replace/delete

Change-Id: I896934c603833dea45cb7e267471c676fa6238f3
diff --git a/res/layout-land/main.xml b/res/layout-land/main.xml
index e3f255f..ac4f8af 100644
--- a/res/layout-land/main.xml
+++ b/res/layout-land/main.xml
@@ -36,8 +36,10 @@
              android:layout_height="match_parent"
              maxDigits="@integer/max_digits">
 
-            <EditText style="@style/display_style" />
-            <EditText style="@style/display_style" />
+            <com.android.calculator2.CalculatorEditText
+                style="@style/display_style" />
+            <com.android.calculator2.CalculatorEditText
+                style="@style/display_style" />
 
         </com.android.calculator2.CalculatorDisplay>
         <ImageButton android:id="@+id/overflow_menu"
diff --git a/res/layout-port/main.xml b/res/layout-port/main.xml
index 60ac2d0..59795c1 100644
--- a/res/layout-port/main.xml
+++ b/res/layout-port/main.xml
@@ -39,8 +39,10 @@
                      android:layout_weight="1"
                      maxDigits="@integer/max_digits">
 
-                    <EditText style="@style/display_style" />
-                    <EditText style="@style/display_style" />
+                    <com.android.calculator2.CalculatorEditText
+                        style="@style/display_style" />
+                    <com.android.calculator2.CalculatorEditText
+                        style="@style/display_style" />
 
                 </com.android.calculator2.CalculatorDisplay>
                 <ImageButton android:id="@+id/overflow_menu"