Export libicuuc headers from libminikin

Test: m -j checkbuild
Change-Id: Ibecebc8a1bd4028c083424476dd379c0ce0149a1

libs/minikin/Android.bp

@@ -77,6 +77,7 @@ cc_library {
     ],
     header_libs: ["libminikin_headers"],
     export_header_lib_headers: ["libminikin_headers"],
+    export_shared_lib_headers: ["libicuuc"],
 
     clang: true,
     sanitize: {