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

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 \

target/product/mainline_system.mk

@@ -27,21 +27,6 @@ PRODUCT_SHIPPING_API_LEVEL := 28
 
 _base_mk_whitelist := \
   recovery/root/etc/mke2fs.conf \
-  recovery/root/system/bin/init \
-  recovery/root/system/bin/ueventd \
-  recovery/root/system/lib64/ld-android.so \
-  recovery/root/system/lib64/libbase.so \
-  recovery/root/system/lib64/libc++.so \
-  recovery/root/system/lib64/libc.so \
-  recovery/root/system/lib64/libcrypto.so \
-  recovery/root/system/lib64/libcutils.so \
-  recovery/root/system/lib64/libdl.so \
-  recovery/root/system/lib64/liblog.so \
-  recovery/root/system/lib64/libm.so \
-  recovery/root/system/lib64/libpackagelistparser.so \
-  recovery/root/system/lib64/libpcre2.so \
-  recovery/root/system/lib64/libselinux.so \
-  recovery/root/system/lib64/libz.so \
 
 ifeq ($(PRODUCT_USE_FASTBOOTD), true)
   _base_mk_whitelist += \