Bump Security String to 2019-10-05

Implemented:
============
CVE:            References:  Type:  Severity:  Updated AOSP versions:
CVE-2019-2114   A-123700348  EoP    High       8.0, 8.1, 9
CVE-2019-2173   A-123013720  EoP    High       7.1.1, 7.1.2, 8.0, 8.1, 9
CVE-2019-2184   A-134578122  RCE    Critical   7.1.1, 7.1.2, 8.0, 8.1, 9
CVE-2019-2185   A-136173699  RCE    Critical   7.1.1, 7.1.2, 8.0, 8.1, 9
CVE-2019-2186   A-136175447  RCE    Critical   7.1.1, 7.1.2, 8.0, 8.1, 9
CVE-2019-2187   A-124940143  ID     High       7.1.1, 7.1.2, 8.0, 8.1, 9, 10

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

Not Applicable (platform source):
===============
CVE:            References:  Type:  Severity:  Updated AOSP versions:
CVE-2019-2110   A-69703445   ID     High       9

Change-Id: Id25a5bb888645636bbfd6b148abbe24ac04ee736