Inherit base system_ext.mk files for aosp targets

Make aosp targets inherit handheld_system_ext.mk and
telephony_system_ext.mk files.
Devices that have /system_ext or /system/system_ext must inherit any
of *_system_ext.mk files to install mandatory packages for system_ext
partition.

Also removed root/init.zygote64_32.rc from the whitelist because it
is already included in mainline_system.mk that does not required to
be whitelisted.

Bug: 144542478
Test: Build aosp targets
Change-Id: I9e4574f8dd54acfd8c2e59e49e0386b1678ab6af
diff --git a/fvp.mk b/fvp.mk
index f403230..b8c33ba 100644
--- a/fvp.mk
+++ b/fvp.mk
@@ -23,8 +23,11 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/mainline_system.mk)
 
-PRODUCT_ARTIFACT_PATH_REQUIREMENT_WHITELIST += \
-    root/init.zygote64_32.rc \
+#
+# All components inherited here go to system_ext image
+#
+$(call inherit-product, $(SRC_TARGET_DIR)/product/handheld_system_ext.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/telephony_system_ext.mk)
 
 #
 # All components inherited here go to product image