make: Enable Storage AIDL for generic-arm builds

Storage TA will expose the
android.hardware.security.see.storage.ISecureStorage interface.

Bug: 300673722
Change-Id: Ifc0e1d10403b0bb1d315c05a297829011ee29d4e
diff --git a/project/generic-arm-inc.mk b/project/generic-arm-inc.mk
index 6bed6b0..f478a6a 100644
--- a/project/generic-arm-inc.mk
+++ b/project/generic-arm-inc.mk
@@ -87,6 +87,7 @@
 
 # Storage should send error reports to the metrics service
 STORAGE_ENABLE_ERROR_REPORTING := true
+STORAGE_AIDL_ENABLED ?= true
 
 ifeq ($(shell expr $(DEBUG) \>= 2), 1)
 CFI_DIAGNOSTICS ?= true