ANDROID: Revert "tracefs: Have tracefs directories not set OTH permission bits by default"

This reverts commit e2c27194.

This change breaks Android userspace tools (tracepoint bpf programs,
simpleperf, atrace, perfetto, ...) that assume access to tracefs.

On Android T and S (QPR2) this is fixed by adding a gid mount option
in userspace, for devices with older kernels the permission change
needs to be reverted.

Bug: 179108380
Bug: 219393750
Bug: 217150407
Bug: 216676030
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Change-Id: I53a63c42b4cf1133a6a2fc1674380ffd8f331392
(cherry picked from commit d2392cf8)
(cherry picked from commit 8418d018)