Add init_second_stage.recovery to base modules.

It was previously being included as a REQUIRED module of
the init module, but including it separately allows
separating the system and recovery artifacts in different
mk files.

Remove the whitelist entries the previous construct
necessitated.

Bug: 112318375
Test: lunch mainline_arm64 && m nothing
Change-Id: I02d9ac73c65ba58bb2acc7b2046b06b58c723ced
diff --git a/target/product/base_vendor.mk b/target/product/base_vendor.mk
index c0728d8..28a04d6 100644
--- a/target/product/base_vendor.mk
+++ b/target/product/base_vendor.mk
@@ -18,6 +18,7 @@
 PRODUCT_PACKAGES += \
     adbd.recovery \
     android.hardware.health@2.0-impl-default.recovery \
+    init_second_stage.recovery \
     ld.config.recovery.txt \
     linker.recovery \
     recovery \