ANDROID: fuse-bpf: Follow mounts in lookups

Bug: 292925770
Test: fuse_test run. The following steps on Android also now pass:

	Create /data/123 and /data/media/0/Android/data/45 directories
	Mount /data/123 directory to /data/media/0/Android/data/45 directory
	Create 1.txt under the /data/123 directory

	File 1.txt should appear in /storage/emulated/0/Android/data/45
Signed-off-by: Paul Lawrence <paullawrence@google.com>
(cherry picked from https://android-review.googlesource.com/q/commit:9323938705b42cb4dd863d5cf8022ba8f2282952)
Merged-In: I1fe27d743ca2981e624a9aa87d9ab6deb313aadc
Change-Id: I1fe27d743ca2981e624a9aa87d9ab6deb313aadc