Support to build against prebuilt current SDK in unbundled branch

Bug: 6465084
With this change and prebuilt current SDK checked in, you can build
unbundled apps with LOCAL_SDK_VERSION current in an unbundled branch.

Change-Id: I4efcee611d08a3a903bd6bf5a80de11500564206
diff --git a/core/static_java_library.mk b/core/static_java_library.mk
index 9165050..367ea5f 100644
--- a/core/static_java_library.mk
+++ b/core/static_java_library.mk
@@ -64,7 +64,7 @@
 framework_res_package_export_deps :=
 # Please refer to package.mk
 ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
-ifneq ($(filter-out current,$(LOCAL_SDK_RES_VERSION)),)
+ifneq ($(filter-out current,$(LOCAL_SDK_RES_VERSION))$(if $(TARGET_BUILD_APPS),$(filter current,$(LOCAL_SDK_RES_VERSION))),)
 framework_res_package_export := \
     $(HISTORICAL_SDK_VERSIONS_ROOT)/$(LOCAL_SDK_RES_VERSION)/android.jar
 framework_res_package_export_deps := $(framework_res_package_export)