brillo: Remove icu.dat file from the Brillo image.

icu.dat is a 22 MB internationalization data file not used by Brillo.
Since Brillo runs in a resource constrained environment, remove
this file for Brillo images.

BUG=25792311
TEST=manual test

Change-Id: I179d65c8667aa36b735f19abcbdf23920d016d87
diff --git a/icu4c/source/common/Android.mk b/icu4c/source/common/Android.mk
index 6e19fd5..901cc88 100644
--- a/icu4c/source/common/Android.mk
+++ b/icu4c/source/common/Android.mk
@@ -235,7 +235,9 @@
 LOCAL_MODULE := libicuuc
 LOCAL_RTTI_FLAG := -frtti
 LOCAL_ADDITIONAL_DEPENDENCIES += $(LOCAL_PATH)/Android.mk
+ifndef BRILLO
 LOCAL_REQUIRED_MODULES += icu-data
+endif
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
 ifneq ($(TARGET_ARCH),mips64)
 LOCAL_CLANG := true
@@ -278,7 +280,9 @@
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE := libicuuc_static
 LOCAL_SRC_FILES += $(src_files)
+ifndef BRILLO
 LOCAL_REQUIRED_MODULES += icu-data
+endif
 ifneq ($(TARGET_ARCH),mips64)
 LOCAL_CLANG := true
 endif