Add com.android.ipsec APEX to base makefile

com.android.ipsec will be shipped as a mainline
module in APEX format

Bug: 143905344
Test: Built and installed apex on device
Change-Id: I70da069146e8d9a7be38ab603c6bdaa9d6d9ba84
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 833bf0f..15ab408 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -51,6 +51,7 @@
     com.android.apex.cts.shim.v1_prebuilt \
     com.android.conscrypt \
     com.android.i18n \
+    com.android.ipsec \
     com.android.location.provider \
     com.android.media \
     com.android.media.swcodec \