media: Update protected media identifier setting/permission

When per-origin provisioning is not available, set the default setting
for "protected media identifier" from "ALLOW" to "ASK". Also update the
infobar text for this case. See Bug for more context.

Bug: 904883
Test: Manually tested on Android L and Android O.
Change-Id: I7de895b592b06806330c90a2a6d0b32591dc4cb4
Reviewed-on: https://chromium-review.googlesource.com/c/1343342
Reviewed-by: Finnur Thorarinsson <finnur@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617864}
15 files changed