Choose CA certificate storage according to userId
Choose CA certificate storage according to userId

Sets the default CA certificate directory at first instantiation so
that only certificates for the current user are searched.

This means that if one user decides to trust a CA no other user of the
device will be forced into trusting that CA as well.

Change-Id: Iaca14a94dd14c598e49a598290e1a80917269eac
xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base