updater_sample: run as a systemp app

Android.mk: remove local tags, make privileged module
AndroidManifest.xml: add access cache filesystem

Test: on device
Test: junit4
Change-Id: I611970747b7b630520249dd53105b9a2f7f76355
Signed-off-by: Zhomart Mukhamejanov <zhomart@google.com>
diff --git a/updater_sample/Android.mk b/updater_sample/Android.mk
index 463dbb3..cff5b0c 100644
--- a/updater_sample/Android.mk
+++ b/updater_sample/Android.mk
@@ -18,8 +18,8 @@
 include $(CLEAR_VARS)
 
 LOCAL_PACKAGE_NAME := SystemUpdaterSample
-LOCAL_MODULE_TAGS := samples
 LOCAL_SDK_VERSION := system_current
+LOCAL_PRIVILEGED_MODULE := true
 
 LOCAL_PROGUARD_FLAG_FILES := proguard.flags