Allow dumpstate to kill dumpstate vendor HAL in timeout case

Bug: 77489941
Test: simulate delay in dumpstate HAL and get BR, see below from dumpstate_log.txt
    dumpstateBoard timed out after 10s, killing dumpstate vendor HAL
    dumpstateBoard failed: Status(EX_TRANSACTION_FAILED): 'DEAD_OBJECT: '
Change-Id: I90ed5cb8fe8da8ad21ae77676433936cb12d9d04

private/property_contexts

@@ -93,6 +93,7 @@ ro.persistent_properties.ready  u:object_r:persistent_properties_ready_prop:s0
 
 # ctl properties
 ctl.bootanim            u:object_r:ctl_bootanim_prop:s0
+ctl.android.hardware.dumpstate u:object_r:ctl_dumpstate_prop:s0
 ctl.dumpstate           u:object_r:ctl_dumpstate_prop:s0
 ctl.fuse_               u:object_r:ctl_fuse_prop:s0
 ctl.mdnsd               u:object_r:ctl_mdnsd_prop:s0

public/dumpstate.te

@@ -271,6 +271,9 @@ allow dumpstate self:netlink_socket create_socket_perms_no_ioctl;
 # newer kernels (e.g. 4.4) have a new class for sockets
 allow dumpstate self:netlink_generic_socket create_socket_perms_no_ioctl;
 
+# Allow dumpstate to kill vendor dumpstate service by init
+set_prop(dumpstate, ctl_dumpstate_prop)
+
 ###
 ### neverallow rules
 ###