[apkverify] Point TODOs in comments to the correct bug ids

This CL updates comments and points the TODOs to the correct bug
ids to give more context.

Test: libapkverify.integration_test
Change-Id: I2eda2be4f89001067c925f422c755c5b7895022f
diff --git a/libs/apkverify/src/lib.rs b/libs/apkverify/src/lib.rs
index f6c1a21..040c304 100644
--- a/libs/apkverify/src/lib.rs
+++ b/libs/apkverify/src/lib.rs
@@ -24,5 +24,5 @@
 mod v3;
 mod ziputil;
 
-// TODO(jooyung) fallback to v2 when v3 not found
+// TODO(b/197052981) fallback to v2 when v3 not found
 pub use v3::{get_public_key_der, pick_v4_apk_digest, verify};