Properly escape dots in file_contexts filenames

I found these with the regex (?<!\\)\.(?!\*|\+)

Test: make
Change-Id: I1c2e817d164b1074cb359cdb6d46bcf71e220765

private/file_contexts

@@ -246,7 +246,7 @@
 /system/bin/recovery-refresh     u:object_r:recovery_refresh_exec:s0
 /system/bin/sdcard      u:object_r:sdcardd_exec:s0
 /system/bin/dhcpcd      u:object_r:dhcp_exec:s0
-/system/bin/dhcpcd-6.8.2	u:object_r:dhcp_exec:s0
+/system/bin/dhcpcd-6\.8\.2	u:object_r:dhcp_exec:s0
 /system/bin/mtpd	u:object_r:mtp_exec:s0
 /system/bin/pppd	u:object_r:ppp_exec:s0
 /system/bin/racoon	u:object_r:racoon_exec:s0
@@ -269,10 +269,10 @@
 /system/bin/update_verifier u:object_r:update_verifier_exec:s0
 /system/bin/logwrapper  u:object_r:system_file:s0
 /system/bin/vdc         u:object_r:vdc_exec:s0
-/system/bin/cppreopts.sh   u:object_r:cppreopts_exec:s0
-/system/bin/preloads_copy.sh u:object_r:preloads_copy_exec:s0
+/system/bin/cppreopts\.sh   u:object_r:cppreopts_exec:s0
+/system/bin/preloads_copy\.sh u:object_r:preloads_copy_exec:s0
 /system/bin/preopt2cachename u:object_r:preopt2cachename_exec:s0
-/system/bin/install-recovery.sh u:object_r:install_recovery_exec:s0
+/system/bin/install-recovery\.sh u:object_r:install_recovery_exec:s0
 /system/bin/dex2oat(d)?     u:object_r:dex2oat_exec:s0
 /system/bin/dexoptanalyzer(d)?     u:object_r:dexoptanalyzer_exec:s0
 # patchoat executable has (essentially) the same requirements as dex2oat.
@@ -302,7 +302,7 @@
 /system/etc/selinux/plat_hwservice_contexts  u:object_r:hwservice_contexts_file:s0
 /system/etc/selinux/plat_file_contexts  u:object_r:file_contexts_file:s0
 /system/etc/selinux/plat_seapp_contexts  u:object_r:seapp_contexts_file:s0
-/system/etc/selinux/plat_sepolicy.cil       u:object_r:sepolicy_file:s0
+/system/etc/selinux/plat_sepolicy\.cil       u:object_r:sepolicy_file:s0
 /system/etc/selinux/plat_and_mapping_sepolicy\.cil\.sha256 u:object_r:sepolicy_file:s0
 /system/usr/share/zoneinfo(/.*)? u:object_r:system_zoneinfo_file:s0
 /system/bin/vr_hwc               u:object_r:vr_hwc_exec:s0
@@ -328,8 +328,8 @@
 
 /(vendor|system/vendor)/lib(64)?/vndk-sp(/.*)? u:object_r:vndk_sp_file:s0
 
-/(vendor|system/vendor)/manifest.xml           u:object_r:vendor_configs_file:s0
-/(vendor|system/vendor)/compatibility_matrix.xml u:object_r:vendor_configs_file:s0
+/(vendor|system/vendor)/manifest\.xml           u:object_r:vendor_configs_file:s0
+/(vendor|system/vendor)/compatibility_matrix\.xml u:object_r:vendor_configs_file:s0
 /(vendor|system/vendor)/etc/vintf(/.*)?        u:object_r:vendor_configs_file:s0
 /(vendor|system/vendor)/app(/.*)?              u:object_r:vendor_app_file:s0
 /(vendor|system/vendor)/priv-app(/.*)?         u:object_r:vendor_app_file:s0
@@ -354,9 +354,9 @@
 /(odm|vendor/odm)/framework(/.*)?             u:object_r:vendor_framework_file:s0
 
 # Input configuration
-/(odm|vendor|vendor/odm)/usr/keylayout(/.*)?.kl            u:object_r:vendor_keylayout_file:s0
-/(odm|vendor|vendor/odm)/usr/keychars(/.*)?.kcm            u:object_r:vendor_keychars_file:s0
-/(odm|vendor|vendor/odm)/usr/idc(/.*)?.idc                 u:object_r:vendor_idc_file:s0
+/(odm|vendor|vendor/odm)/usr/keylayout(/.*)?\.kl            u:object_r:vendor_keylayout_file:s0
+/(odm|vendor|vendor/odm)/usr/keychars(/.*)?\.kcm            u:object_r:vendor_keychars_file:s0
+/(odm|vendor|vendor/odm)/usr/idc(/.*)?\.idc                 u:object_r:vendor_idc_file:s0
 
 /oem(/.*)?              u:object_r:oemfs:s0
 
@@ -365,12 +365,12 @@
 /odm/etc/selinux/precompiled_sepolicy                           u:object_r:sepolicy_file:s0
 /odm/etc/selinux/precompiled_sepolicy\.plat_and_mapping\.sha256 u:object_r:sepolicy_file:s0
 
-/(odm|vendor/odm)/etc/selinux/odm_sepolicy.cil                  u:object_r:sepolicy_file:s0
+/(odm|vendor/odm)/etc/selinux/odm_sepolicy\.cil                  u:object_r:sepolicy_file:s0
 /(odm|vendor/odm)/etc/selinux/odm_file_contexts                 u:object_r:file_contexts_file:s0
 /(odm|vendor/odm)/etc/selinux/odm_seapp_contexts                u:object_r:seapp_contexts_file:s0
 /(odm|vendor/odm)/etc/selinux/odm_property_contexts             u:object_r:property_contexts_file:s0
 /(odm|vendor/odm)/etc/selinux/odm_hwservice_contexts            u:object_r:hwservice_contexts_file:s0
-/(odm|vendor/odm)/etc/selinux/odm_mac_permissions.xml           u:object_r:mac_perms_file:s0
+/(odm|vendor/odm)/etc/selinux/odm_mac_permissions\.xml           u:object_r:mac_perms_file:s0
 
 #############################
 # Product files
@@ -438,7 +438,7 @@
 /data/misc/camera(/.*)?         u:object_r:camera_data_file:s0
 /data/misc/carrierid(/.*)?      u:object_r:radio_data_file:s0
 /data/misc/dhcp(/.*)?           u:object_r:dhcp_data_file:s0
-/data/misc/dhcp-6.8.2(/.*)?     u:object_r:dhcp_data_file:s0
+/data/misc/dhcp-6\.8\.2(/.*)?     u:object_r:dhcp_data_file:s0
 /data/misc/gatekeeper(/.*)?     u:object_r:gatekeeper_data_file:s0
 /data/misc/incidents(/.*)?	    u:object_r:incident_data_file:s0
 /data/misc/keychain(/.*)?       u:object_r:keychain_data_file:s0
@@ -522,7 +522,7 @@
 /data/system_ce/[0-9]+/shortcut_service/bitmaps(/.*)? u:object_r:shortcut_manager_icons:s0
 
 # User icon files
-/data/system/users/[0-9]+/photo.png             u:object_r:icon_file:s0
+/data/system/users/[0-9]+/photo\.png             u:object_r:icon_file:s0
 
 # vold per-user data
 /data/misc_de/[0-9]+/vold(/.*)?           u:object_r:vold_data_file:s0