Revert fix for #29182 and backport upstream arc4random_buf fix
We should use https://hg.mozilla.org/mozilla-central/rev/57664c81a1de instead of disabling arc4rdandom_buf
for our Android builds.
We should use https://hg.mozilla.org/mozilla-central/rev/57664c81a1de instead of disabling arc4rdandom_buf
for our Android builds.