Added ims packages (for VoLTE support)

Added packages to enable Voice over LTE (VoLTE).
diff --git a/device.mk b/device.mk
index 2ca506a..bf9b2b7 100644
--- a/device.mk
+++ b/device.mk
@@ -57,6 +57,12 @@
     libqcomvisualizer \
     libqcomvoiceprocessing \
     tinymix
+    
+#VoLTE calling support
+PRODUCT_PACKAGES += \
+    com.android.ims \
+    com.android.ims.internal \
+    ims-common
 
 # Audio configuration
 PRODUCT_COPY_FILES += \