Allow uninstallable APPs.

Bug: 5264671
This is needed by cts tests.
It's harmless to existing modules.

Change-Id: I0083471f80d483559b27523d4b88190d7913f6f1
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 3c11673..d0dd703 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -194,14 +194,8 @@
 LOCAL_BUILT_MODULE := $(built_module_path)/$(LOCAL_BUILT_MODULE_STEM)
 built_module_path :=
 
-# LOCAL_UNINSTALLABLE_MODULE is only allowed to be used by the
-# internal STATIC_LIBRARIES build files.
 LOCAL_UNINSTALLABLE_MODULE := $(strip $(LOCAL_UNINSTALLABLE_MODULE))
-ifdef LOCAL_UNINSTALLABLE_MODULE
-  ifeq (,$(filter $(LOCAL_MODULE_CLASS),JAVA_LIBRARIES STATIC_LIBRARIES))
-    $(error $(LOCAL_PATH): Illegal use of LOCAL_UNINSTALLABLE_MODULE)
-  endif
-else
+ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
   LOCAL_INSTALLED_MODULE := $(LOCAL_MODULE_PATH)/$(LOCAL_MODULE_SUBDIR)$(LOCAL_INSTALLED_MODULE_STEM)
 endif