[Ravenwood] Enable PFD.getStatSize and cleanup implementation

Bug: 353521759
Flag: EXEMPT host side test change only
Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/run-ravenwood-tests.sh
Change-Id: I011f14bdefb041d6f75a5d4c1d729dc368528d09
10 files changed