commit c903df121a4a28b0bd2f8694f119fd228a2f76ae
author arthurhung <arthurhung@google.com> Tue Aug 11 15:08:42 2020 +0800
committer arthurhung <arthurhung@google.com> Thu Aug 27 09:53:23 2020 +0800
tree 706c6bc8270da9b9b492d24cedcac5461b46e71e
parent dcef2dcd3ca47a138d2ee679f5e29bf0751e4419

Maintain CapsLock, NumLock and ScrollLock of keyboard

Currently, CapsLock, NumLock and ScrollLock would keep the state in
KeyboardInputMapper. It cause 2 problems:

1. If user reattach the hardware keyboard, the state would be reset.
2. If there are multiple hardware keyboards, we can't make them
consistent.

We need to store them in the global state and notify others if there
is some state changed.

- Store the meta state of CapsLock, NumLock and ScrollLock in InputReader.
- Set NumLock default on.

Bug: 141329037
Test: atest inputflinger_tests
Change-Id: I3ff5e9d25ed76466a86080350f00d39d6db57c8c