Allow keystore to read and write keystore.crash_count system property.

Additionally, remove the obsolete permission which allows keystore to
register callbacks with statsd. There's no direct communication between
keystore and statsd now.

Ignore-AOSP-First: No mergepath to AOSP.
Bug: 188590587
Test: statsd TestDrive script.
Merged-In: I31d202751ba78bb547822020260a7e366cb8826e

Change-Id: I31d202751ba78bb547822020260a7e366cb8826e
diff --git a/private/property_contexts b/private/property_contexts
index 593274f..8741fbe 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -1153,6 +1153,9 @@
 # Broadcast boot stages, which keystore listens to
 keystore.boot_level u:object_r:keystore_listen_prop:s0 exact int
 
+# Property that tracks keystore crash counts during a boot cycle.
+keystore.crash_count u:object_r:keystore_crash_prop:s0 exact int
+
 partition.system.verified     u:object_r:verity_status_prop:s0 exact string
 partition.system_ext.verified u:object_r:verity_status_prop:s0 exact string
 partition.product.verified    u:object_r:verity_status_prop:s0 exact string