Rename data directory to P

ro.vndk.version is set to codename before being released.
This patch renames the directory from "current" to "P". If the device's
ro.vndk.version is empty, the test program loads data from P.

Bug: 70487344
Test: vts-tradefed run commandAndExit vts -m VtsVndkFiles
Change-Id: Ia1f2c4d71705cf9a43c6d1290d2d7909468dbc8b
200 files changed