Add some OTA related entries to misc_info.txt

Corresponding make code: https://cs.android.com/android/_/android/platform/build/+/8445b1703a24d34a2c6fc789f47cf81ceda3aaea:core/Makefile;l=5957-5965;drc=519f75666431ee2926e0ec8991c682b28a4c9521;bpv=1;bpt=0

This adds a subset of the args passed to mkbootimg cmd of the bootimg
deps. For cuttlefish, `header_version` seems to be the only argument
added to BOARD_*_MKBOOTIMG_ARGS.

Bug: 398036609
Test: Built Soong target_files.zip locally
Change-Id: I1e8e61df00a538c63b7020a3c9fa027ce3e52e12
diff --git a/android/config.go b/android/config.go
index 2a4b927..885960b 100644
--- a/android/config.go
+++ b/android/config.go
@@ -1212,6 +1212,10 @@
 	return otaPaths
 }
 
+func (c *config) ExtraOtaRecoveryKeys() []string {
+	return c.productVariables.ExtraOtaRecoveryKeys
+}
+
 func (c *config) BuildKeys() string {
 	defaultCert := String(c.productVariables.DefaultAppCertificate)
 	if defaultCert == "" || defaultCert == filepath.Join(testKeyDir, "testkey") {