Add some additional glyphs to longpress key dialogs.

Addresses http://b/issue?id=2220888 by including curly
single quotes underneath the straight single quote key.

Introduces a number of other useful Unicode glyphs as well.
diff --git a/res/xml/kbd_symbols_shift.xml b/res/xml/kbd_symbols_shift.xml
index 56428a3..d83594a 100755
--- a/res/xml/kbd_symbols_shift.xml
+++ b/res/xml/kbd_symbols_shift.xml
@@ -29,7 +29,10 @@
         <Key android:keyLabel="~" android:keyEdgeFlags="left"/>
         <Key android:keyLabel="`"/>
         <Key android:keyLabel="|"/>
-        <Key android:keyLabel="•"/>
+        <Key android:keyLabel="•"
+                android:popupKeyboard="@xml/kbd_popup_template"
+                android:popupCharacters="♪♥♠♦♣"
+        />
         <Key android:keyLabel="√"/>
         <Key android:keyLabel="π"/>
         <Key android:keyLabel="÷"/>
@@ -44,7 +47,10 @@
         <Key android:keyLabel="¢"/>
         <Key android:keyLabel="€"/>
         <Key android:keyLabel="°"/>
-        <Key android:keyLabel="^"/>
+        <Key android:keyLabel="^"
+                android:popupKeyboard="@xml/kbd_popup_template"
+                android:popupCharacters="↑↓←→"
+        />
         <Key android:keyLabel="_"/>
         <Key android:keyLabel="="
                 android:popupKeyboard="@xml/kbd_popup_template"
@@ -61,7 +67,10 @@
         <Key android:keyLabel="™"/>
         <Key android:keyLabel="®"/>
         <Key android:keyLabel="©"/>
-        <Key android:keyLabel="¶"/>
+        <Key android:keyLabel="¶"
+                android:popupKeyboard="@xml/kbd_popup_template"
+                android:popupCharacters="§"
+        />
         <Key android:keyLabel="\\"/>
         <Key android:keyLabel="&lt;" 
                 android:popupKeyboard="@xml/kbd_popup_template"