Cherry pick [Android] When toggling AX script inject, also set native AX state.

Cherry pick of https://codereview.chromium.org/24559002/

Bug: 10911684

Original description:
[Android] When toggling AX script inject, also set native AX state.
When we enable/disable script injection, also update the flag that
says whether we should use native accessibility.

Change-Id: I6ff2ee7cb0309ec0f279178245056a6de3df560c
1 file changed