V18.4.0 CAS plugin

Note that this version does not have Widevine Provisioning 4.0 support.
It is only suitable for device upgrades. A new patch with provisioning
4.0 support will be made later.

wvutil/Android.bp

@@ -0,0 +1,31 @@
+// Builds libcasutil.a
+cc_library_static {
+
+  name: "libcasutil",
+
+  proprietary: true,
+
+  local_include_dirs: [
+      "include",
+  ],
+
+  srcs: [
+    "src/clock.cpp",
+    "src/log.cpp",
+    "src/file_store.cpp",
+    "src/file_utils.cpp",
+    "src/rw_lock.cpp",
+    "src/string_conversions.cpp",
+    "src/android_properties.cpp",
+    "src/timer.cpp",
+  ],
+
+  shared_libs: [
+      "liblog",
+      "libutils",
+      "libcrypto",
+      "libhidlbase",
+  ],
+
+  export_include_dirs: ["include"],
+}