Fix voice key on phone device

This change,
- changes voice key code back to -102
- renames some key code names and method names
- adds mic_slash_holo to drawable-hdpi

Change-Id: I8be3a20921f472ece4298edad2d275f29a7e4955
diff --git a/java/res/values/strings.xml b/java/res/values/strings.xml
index bd17bd2..78de94f 100644
--- a/java/res/values/strings.xml
+++ b/java/res/values/strings.xml
@@ -410,7 +410,7 @@
     <string name="subtype_mode_sr_keyboard">Serbian Keyboard</string>
     <string name="subtype_mode_sv_keyboard">Swedish Keyboard</string>
 
-    <string name="subtype_mode_cs_voice">Czech Voice</string>
+    <string name="subtype_mode_cs_voice">Czech Voice</string>
     <string name="subtype_mode_de_voice">German Voice</string>
     <string name="subtype_mode_en_AU_voice">English (Australia) Voice</string>
     <string name="subtype_mode_en_GB_voice">English (Great Britain) Voice</string>