Update bug component from Android Systems to memory

It's been a while since the Android Systems bug component does not
access the creation of new bugs for triage, instead, new bugs must
be created in the subcomponents of the team.

Test: none
Bug: 270571229
Change-Id: I4826466c780f1fdecd9970127a501d3f2d4858fb
Signed-off-by: Alessio Balsini <balsini@google.com>