base_system.mk: Switch to wifi mainline apex

Also, explicitly include the cacerts_wfa in builds. This used to be
included via the "required" tag in wifi-service build rule. We probably don't
want to deliver CA certificates to OEM devices via mainline updates. So,
leaving it out of the wifi mainline module & explicitly including it in
the base makefile.

Bug: 144722612
Test: Device boots up & connects to wifi networks.
Change-Id: I3e4487f9fad765e442bf8335ec1f21de3a47674d
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 1af367a..1167716 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -46,6 +46,7 @@
     bu \
     bugreport \
     bugreportz \
+    cacerts_wfa \
     cgroups.json \
     charger \
     cmd \
@@ -60,6 +61,7 @@
     com.android.resolv \
     com.android.neuralnetworks \
     com.android.tzdata \
+    com.android.wifi \
     ContactsProvider \
     content \
     crash_dump \
@@ -267,7 +269,6 @@
     vold \
     WallpaperBackup \
     watchdogd \
-    wifi-service \
     wificond \
     wm \