perfetto-cmd: Reset guardrail state on boot

If the file exists:
$ adb logcat | grep init | grep perfetto
04-18 06:56:23.738     1     1 I init    : Parsing file /system/etc/init/perfetto.rc...
04-18 06:56:25.774     1     1 I init    : processing action (post-fs-data) from (/system/etc/init/perfetto.rc:67)
04-18 06:56:26.288     1     1 I init    : processing action (debug.atrace.user_initiated= && persist.traced.enable=1) from (/system/etc/init/perfetto.rc:47)
04-18 06:56:26.297     1     1 I init    : processing action (persist.traced.enable=1) from (/system/etc/init/perfetto.rc:50)

If the file does not exist:
$ adb logcat | grep init | grep perfetto
04-18 06:57:25.769     1     1 I init    : Parsing file /system/etc/init/perfetto.rc...
04-18 06:57:27.807     1     1 I init    : processing action (post-fs-data) from (/system/etc/init/perfetto.rc:67)
04-18 06:57:27.808     1     1 I init    : Command 'rm /data/misc/perfetto-traces/.guardraildata' action=post-fs-data (/system/etc/init/perfetto.rc:68) took 0ms and failed: unlink() failed: No such file or directory
04-18 06:57:28.279     1     1 I init    : processing action (debug.atrace.user_initiated= && persist.traced.enable=1) from (/system/etc/init/perfetto.rc:47)
04-18 06:57:28.280     1     1 I init    : processing action (persist.traced.enable=1) from (/system/etc/init/perfetto.rc:50

Bug: 144898560
Change-Id: I49406eb14a7df6e714b6a0948444173285904986
diff --git a/perfetto.rc b/perfetto.rc
index 8d07713..a33bd03 100644
--- a/perfetto.rc
+++ b/perfetto.rc
@@ -62,3 +62,7 @@
 on property:persist.traced.enable=0
     stop traced
     stop traced_probes
+
+# Reset the Perfetto guard rail state on boot:
+on post-fs-data
+    rm /data/misc/perfetto-traces/.guardraildata