Bump Security String to 2021-01-05

Implemented:
============
CVE:            References:  Type:  Severity:  Updated AOSP versions:
CVE-2016-6328   A-162602132  RCE    High       8.0, 8.1, 9, 10, 11
CVE-2019-9376   A-129287265  DoS    High       8.0, 8.1, 9
CVE-2020-0471   A-169327567  EoP    High       8.0, 8.1, 9, 10, 11
CVE-2021-0304   A-162738636  ID     High       8.0, 8.1, 9, 10
CVE-2021-0306   A-154505240  EoP    High       8.0, 8.1, 9, 10, 11
CVE-2021-0308   A-158063095  EoP    High       8.0, 8.1, 9, 10, 11
CVE-2021-0309   A-158480899  ID     High       8.0, 8.1, 9, 10, 11
CVE-2021-0311   A-170240631  ID     High       8.0, 8.1, 9, 10, 11
CVE-2021-0312   A-170583712  ID     High       8.0, 8.1, 9, 10, 11
CVE-2021-0313   A-170968514  DoS    Critical   8.0, 8.1, 9, 10, 11
CVE-2021-0315   A-169763814  EoP    High       8.0, 8.1, 9, 10, 11
CVE-2021-0316   A-168802990  RCE    Critical   8.0, 8.1, 9, 10, 11
CVE-2021-0317   A-168319670  EoP    High       8.0, 8.1, 9, 10, 11
CVE-2021-0318   A-168211968  EoP    High       8.1, 9, 10, 11
CVE-2021-0319   A-167244818  EoP    High       8.0, 8.1, 9, 10, 11

Previously Implemented:
=======================
CVE:            References:  Type:  Severity:  Updated AOSP versions:
CVE-2020-15999  A-171232105  RCE    Moderate   8.0, 8.1, 9, 10, 11

Not Implemented:
================
None

Not Applicable (platform source):
=================================
CVE:            References:  Type:  Severity:  Updated AOSP versions:
CVE-2021-0303   A-170407229  EoP    High       11
CVE-2021-0307   A-155648771  EoP    High       10, 11
CVE-2021-0310   A-170212632  EoP    High       11
CVE-2021-0320   A-169933423  ID     High       10, 11
CVE-2021-0321   A-166667403  ID     High       11
CVE-2021-0322   A-159145361  ID     High       9, 10, 11

Change-Id: Ic1ed6275280ab763aad4f90f7ea404f46af519f9