bootstat: Add some reserved sys.boot.reason values to enumeration

Add cold,powerkey, warm,s3_wakeup and hard,hw_reset so that
sys.boot.reason values can also be enumerated.  Also add
some reserved speculative entries associated with forced
suspend to RAM and DISK; shutdown,suspend and shutdown,hibernate
respectively.

Test: system/core/bootstat/boot_reason_test.sh
Bug: 67636061
Change-Id: Ic43523748e6006aaca882f8eec7c1f0c08431bd8
diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index 1954966..3609127 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -205,6 +205,11 @@
     {"reboot,adb", 67},
     {"reboot,userrequested", 68},
     {"shutdown,container", 69},  // Host OS asking Android Container to shutdown
+    {"cold,powerkey", 70},
+    {"warm,s3_wakeup", 71},
+    {"hard,hw_reset", 72},
+    {"shutdown,suspend", 73},    // Suspend to RAM
+    {"shutdown,hibernate", 74},  // Suspend to DISK
 };
 
 // Converts a string value representing the reason the system booted to an