HALO: Fix NPE on PieStatusPanel

When disabling halo through master switch, when going to pie's notification, the Pie status panel FC and link up to NullPointerException
Revert removing FLAG_ACTIVITY_CLEAR_TOP from intent
Removing that flag from the intent provokes some apps not being able to finish pressing the back key.
This change doesn't affect other opened apps.

Change-Id: I81a47f8e648114d8e2144a3b9854ede299d67871
Don't consider input restricted when the lockscreen is disabled by an
app.

Fixes the secure lockscreen occasionally appearing when disabling the
lockscreen via tile.

Change-Id: I078584d0235c1cc958f89ce12ddf3cc1117a5687
Clean up unnecessary backslashes

* Last line in a PRODUCT_COPY_FILES block shouldn't end with backslash

Change-Id: I57b4914048a2a17ff98057844941898b682dbcd5
Allow multiple emulated storages at the same time.

Only do multiuser mapping for primary emulated storage as per google docs.
Allow all non-primary emulated storage to have id other than 0 so that
it could be distinguished from the primary volume.

Change-Id: I7b70b9067fd6211055fb9074710f48107d7b0e8e