Extract annotationItem from annotationValue in TestableValue

Needed by follow-up changes.

Bug: 354633349
Test: ./gradlew
Change-Id: Ia8820bf4e7dd16dbfdf75f9f393339a3f27bb017
diff --git a/tools/metalava b/tools/metalava
index f0dd8c1..5a4a066 160000
--- a/tools/metalava
+++ b/tools/metalava
@@ -1 +1 @@
-Subproject commit f0dd8c17ef020e4fc8d5c1b5913c97c9319c08dd
+Subproject commit 5a4a066a85440edc61af8a2126c53c67b529c71a