Permissions for /dev/uinput

Currently /dev/uinput is owned by system/bluetooth.
But that's inconsistent with some of the sepolicies for uhid_device.
This also means that the new native tests for inputflinger aren't able
to execute properly, because they require the ability to register a new
input device via uinput.

Bug: none
Test: atest inputflinger_test
The newly added EventHub_test is still under review

Change-Id: I53524738db1a5d3ba962b9bec35ef322ed3028f2

rootdir/ueventd.rc

@@ -72,7 +72,7 @@ subsystem sound
 /dev/diag_arm9            0660   radio      radio
 /dev/ttyMSM0              0600   bluetooth  bluetooth
 /dev/uhid                 0660   uhid       uhid
-/dev/uinput               0660   system     bluetooth
+/dev/uinput               0660   uhid       uhid
 /dev/alarm                0664   system     radio
 /dev/rtc0                 0640   system     system
 /dev/tty0                 0660   root       system