minui: Export minui/minui.h.

For libminui static and shared libraries.

Test: build
Change-Id: Ib30dc5e2ef4a3c8b3ca3a0cec68cb65e229a0c16
diff --git a/Android.mk b/Android.mk
index 633f18d..f8e5ac2 100644
--- a/Android.mk
+++ b/Android.mk
@@ -151,7 +151,11 @@
     asn1_decoder.cpp \
     verifier.cpp \
     ui.cpp
-LOCAL_STATIC_LIBRARIES := libcrypto_utils libcrypto libbase
+LOCAL_STATIC_LIBRARIES := \
+    libminui \
+    libcrypto_utils \
+    libcrypto \
+    libbase
 LOCAL_CFLAGS := -Werror
 include $(BUILD_STATIC_LIBRARY)