bootstat: add 3 pmic off reasons to known set

regular expression:
- "reboot,pmic_off_fault,.*" (175)
- "reboot,pmic_off_s3rst,.*" (176)
- "reboot,pmic_off_other,.*" (177)

regex is dependent on:
https://android-review.googlesource.com/947976

Test: none
Bug: 116838876
Bug: 128929506
Change-Id: I7fae9ecee536f790c8f493c3f5e5f75b03efb1d6
Signed-off-by: Jone Chou <jonechou@google.com>
diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index 617ea4f..558e6c4 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -301,6 +301,9 @@
     {"reboot,dm-verity_device_corrupted", 172},
     {"reboot,dm-verity_enforcing", 173},
     {"reboot,keys_clear", 174},
+    {"reboot,pmic_off_fault,.*", 175},
+    {"reboot,pmic_off_s3rst,.*", 176},
+    {"reboot,pmic_off_other,.*", 177},
 };
 
 // Converts a string value representing the reason the system booted to an