Revert "iorap: Enable by default"

AOSP disabled iorap in March tag: ArrowOS/android_build@b73d551

This reverts commit b1730cd.

Change-Id: I877af01fed38d6e12ba6100e7e5fa43eab01a5b0

Author: palaych

startop/iorap/src/com/google/android/startop/iorap/IorapForwardingService.java

@@ -158,7 +158,7 @@ protected boolean isIorapEnabled() {
         // These two mendel flags should match those in iorapd native process
         // system/iorapd/src/common/property.h
         boolean isTracingEnabled =
-            getMendelFlag("iorap_perfetto_enable", "iorapd.perfetto.enable", true);
+            getMendelFlag("iorap_perfetto_enable", "iorapd.perfetto.enable", false);
         boolean isReadAheadEnabled =
             getMendelFlag("iorap_readahead_enable", "iorapd.readahead.enable", false);
         // Same as the property in iorapd.rc -- disabling this will mean the 'iorapd' binder process