iorapd: Enable readahead for iorapd on blueline devices.

Test: Run and check if readahead is enabled.
Change-Id: I4c21e0d2e02d0cfaeb9c609c9f65cc35b5db7e15
diff --git a/device-blueline.mk b/device-blueline.mk
index 77659fe..cc54830 100644
--- a/device-blueline.mk
+++ b/device-blueline.mk
@@ -37,3 +37,6 @@
 # Enable iorapd perfetto tracing for app starts
 PRODUCT_PRODUCT_PROPERTIES += \
     iorapd.perfetto.enable=true
+# Enable iorapd readahead for app starts
+PRODUCT_PRODUCT_PROPERTIES += \
+    iorapd.readahead.enable=true