Remove hardcoded ICU include paths.

ICU exports them using LOCAL_EXPORT_C_INCLUDE_DIRS.

bug: 18581021
Change-Id: Ia57b3b4d231966203274b0e7e7b850beb1bd11c0

libs/minikin/Android.mk

@@ -33,7 +33,6 @@ LOCAL_MODULE := libminikin
 LOCAL_C_INCLUDES += \
     external/harfbuzz_ng/src \
     external/freetype/include \
-    external/icu/icu4c/source/common \
     frameworks/minikin/include
 
 LOCAL_SHARED_LIBRARIES := \

sample/Android.mk

@@ -21,7 +21,6 @@ LOCAL_MODULE_TAGS := tests
 LOCAL_C_INCLUDES += \
 	external/harfbuzz_ng/src \
 	external/freetype/include \
-	external/icu/icu4c/source/common \
 	frameworks/minikin/include
 
 LOCAL_SRC_FILES:= example.cpp
@@ -49,7 +48,6 @@ LOCAL_MODULE_TAG := tests
 LOCAL_C_INCLUDES += \
 	external/harfbuzz_ng/src \
 	external/freetype/include \
-	external/icu/icu4c/source/common \
 	frameworks/minikin/include \
 	external/skia/src/core