Add getSupplementaryAttestationInfo

Allows clients to retrieve information required to interpret certain
attested values found in the attestation certificate.

Currently only relevant for Tag::MODULE_HASH, for which it returns the
encoded structure whose hash ends up in the attestation certificate.

Bug: 369375199
Test: treehugger
API-Coverage-Bug: 378549695
Change-Id: I2bac10ad148279ea3aa3907a982a3e598502c788
Merged-In: I29bb8f9108747a0ed2a1a678811858e8572d285f
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index e71ded9..c8f5674 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -101,6 +101,7 @@
         "framework-jobscheduler-job.flags-aconfig-java",
         "framework_graphics_flags_java_lib",
         "hwui_flags_java_lib",
+        "keystore2_flags_java-framework",
         "power_flags_lib",
         "sdk_sandbox_flags_lib",
         "surfaceflinger_flags_java_lib",