Add CAP_BLOCK_SUSPEND to OS constants

Bug: 10901016
Change-Id: I162bde82bce9fca8eabc7168a172d3d8365e1578
libcore: Set CAP_LAST_CAP as CAP_BLOCK_SUSPEND

CAP_LAST_CAP was being set to CAP_ALARM_WAKE which did not allow
system processes to acquire CAP_BLOCK_SUSPEND capability.
This change correctly sets CAP_LAST_CAP to CAP_BLOCK_SUSPEND.

Change-Id: I812edf75eec8f228e2a5d49ae0d3a250e10e0994
Libcore: Add .aac MIME TYPE

Change will add support for .aac files.

CRs-Fixed: 573663
Change-Id: If2564b439fd5943396959ba1f6a2d7a5a53923ca