Add libaudiohal to mainline system image

32-bit libaudiohal is used by 3rd party modules on the system
partition which get loaded by client apps. In the long term,
this dependency has to be eliminated, see b/142811260.

Bug: 141989952
Bug: 142811260
Test: vendor/google/build/build_test.bash
Merged-In: I41241922c7e48c5d8bf95363944932569cb20c0a
Change-Id: I41241922c7e48c5d8bf95363944932569cb20c0a
diff --git a/target/product/mainline_system.mk b/target/product/mainline_system.mk
index 721f5d9..441e366 100644
--- a/target/product/mainline_system.mk
+++ b/target/product/mainline_system.mk
@@ -78,6 +78,7 @@
     android.hardware.secure_element@1.0 \
     android.hardware.wifi@1.0 \
     libaudio-resampler \
+    libaudiohal \
     libdrm \
     liblogwrap \
     liblz4 \