Allow shell to find all services.

dumpsys from shell results in many denials:
11-08 02:52:13.087   171   171 E SELinux : avc:  denied  { find } for service=SurfaceFlinger scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager
11-08 02:52:13.089   171   171 E SELinux : avc:  denied  { find } for service=android.security.keystore scontext=u:r:shell:s0 tcontext=u:object_r:keystore_service:s0 tclass=service_manager
11-08 02:52:13.093   171   171 E SELinux : avc:  denied  { find } for service=batteryproperties scontext=u:r:shell:s0 tcontext=u:object_r:healthd_service:s0 tclass=service_manager
11-08 02:52:13.103   171   171 E SELinux : avc:  denied  { find } for service=display.qservice scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager
11-08 02:52:13.104   171   171 E SELinux : avc:  denied  { find } for service=drm.drmManager scontext=u:r:shell:s0 tcontext=u:object_r:drmserver_service:s0 tclass=service_manager
11-08 02:52:13.113   171   171 E SELinux : avc:  denied  { find } for service=media.audio_flinger scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.113   171   171 E SELinux : avc:  denied  { find } for service=media.audio_policy scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.113   171   171 E SELinux : avc:  denied  { find } for service=media.camera scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.114   171   171 E SELinux : avc:  denied  { find } for service=media.player scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.114   171   171 E SELinux : avc:  denied  { find } for service=media.sound_trigger_hw scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.118   171   171 E SELinux : avc:  denied  { find } for service=nfc scontext=u:r:shell:s0 tcontext=u:object_r:nfc_service:s0 tclass=service_manager
11-08 02:52:13.130   171   171 E SELinux : avc:  denied  { find } for service=SurfaceFlinger scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager
11-08 02:52:13.379   171   171 E SELinux : avc:  denied  { find } for service=android.security.keystore scontext=u:r:shell:s0 tcontext=u:object_r:keystore_service:s0 tclass=service_manager
11-08 02:52:13.388   171   171 E SELinux : avc:  denied  { find } for service=batteryproperties scontext=u:r:shell:s0 tcontext=u:object_r:healthd_service:s0 tclass=service_manager
11-08 02:52:13.574   171   171 E SELinux : avc:  denied  { find } for service=display.qservice scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager
11-08 02:52:13.576   171   171 E SELinux : avc:  denied  { find } for service=drm.drmManager scontext=u:r:shell:s0 tcontext=u:object_r:drmserver_service:s0 tclass=service_manager
11-08 02:52:13.712   171   171 E SELinux : avc:  denied  { find } for service=media.audio_flinger scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.712   171   171 E SELinux : avc:  denied  { find } for service=media.audio_policy scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.713   171   171 E SELinux : avc:  denied  { find } for service=media.camera scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.713   171   171 E SELinux : avc:  denied  { find } for service=media.player scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager
11-08 02:52:13.713   171   171 E SELinux : avc:  denied  { find } for service=media.sound_trigger_hw scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager

Bug: 18799966
Change-Id: Id2bf69230338ac9dd45dc5d70f419fa41056e4fc