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.xml b/res/xml/kbd_symbols.xml
index f3b8833..48afd89 100755
--- a/res/xml/kbd_symbols.xml
+++ b/res/xml/kbd_symbols.xml
@@ -73,7 +73,7 @@
         <Key android:codes="38" android:keyLabel="&amp;"/>
         <Key android:codes="42" android:keyLabel="*"
                 android:popupKeyboard="@xml/kbd_popup_template"
-                android:popupCharacters="†‡"
+                android:popupCharacters="†‡⁂★"
         />
         <Key android:codes="45" android:keyLabel="-"
                 android:popupKeyboard="@xml/kbd_popup_template"
@@ -105,7 +105,10 @@
                 android:popupKeyboard="@xml/kbd_popup_template"
                 android:popupCharacters="“”«»˝"
         />
-        <Key android:codes="39" android:keyLabel="\'"/>
+        <Key android:codes="39" android:keyLabel="\'"
+                android:popupKeyboard="@xml/kbd_popup_template"
+                android:popupCharacters="‘’"
+        />
         <Key android:codes="58" android:keyLabel=":"/>
         <Key android:codes="59" android:keyLabel=";"/>
         <Key android:codes="47" android:keyLabel="/" />
@@ -136,4 +139,4 @@
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
                 />
     </Row>
-</Keyboard>
\ No newline at end of file
+</Keyboard>