Remove VoicePhone interface

VoicePhone interface was not a generic voice phone. It was a partial
implementation of an ImsPhone (i.e. served no added-value purpose but
confused functionality). Removed.

Change-Id: Ida5d0fb2b09dcc6ec295ddd7a03f2cf6536b840b

Conflicts:
	CleanSpec.mk
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 2f407a4..9caa0ad 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -48,6 +48,7 @@
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST