Remove references to non-existant directories

Fixes warnings during makefile parsing:
FindEmulator: find: `packages/apps/Dialer/InCallUI/src-N': No such file or directory
FindEmulator: find: `packages/apps/PhoneCommon/src-N': No such file or directory

Test: builds
Change-Id: Idccbbb50a75ad953f8e5722c9803353dc3c9a714
diff --git a/Android.mk b/Android.mk
index eb6cbdc..32913fe 100644
--- a/Android.mk
+++ b/Android.mk
@@ -25,9 +25,7 @@
 
 src_dirs += \
     src-N \
-    $(incallui_dir)/src-N \
-    $(contacts_common_dir)/src-N \
-    $(phone_common_dir)/src-N
+    $(contacts_common_dir)/src-N
 
 LOCAL_SRC_FILES := $(call all-java-files-under, $(src_dirs))
 LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/, $(res_dirs)) \