add 32 bit requirement back because of regression from CTS

bug: 158703549
bug: 158888458
test: Manual
Change-Id: I6248858bac1a59f2f7e7213f4096192925419e3f
diff --git a/cas/1.0/default/Android.bp b/cas/1.0/default/Android.bp
index 802dce1..f9977ff 100644
--- a/cas/1.0/default/Android.bp
+++ b/cas/1.0/default/Android.bp
@@ -12,6 +12,8 @@
       "TypeConvert.cpp",
     ],
 
+    compile_multilib: "32",
+
     shared_libs: [
       "android.hardware.cas@1.0",
       "android.hardware.cas.native@1.0",