CFBundleIdentifier should be unique for each channel on OSX

[RyanJarv]

Description

From what I recall (will follow up with sources) problematic issues can come up if two apps have the same CFBundleIdentifier value.

Steps to Reproduce

1. Install the dev build
2. Install the beta build (unavailable currently)

Actual result:

CFBundleIdentifier is set to org.brave.Brave for both dev/beta builds

I suspect it may also be causing this issue:

• Launcher only shows one kind of channel app on MacOS #469

Expected result:

CFBundleIdentifier is different for the dev and beta builds

Brave version (about:brave info)

master branch

Additional Information

Needs updating:

• Brave.app Info.plist
  • https://github.com/brave/brave-core/blob/775ab495e2f88a04890d4c8f760f5330edb03211/BUILD.gn#L320
• codesign requirements arg during app signing
  • https://github.com/brave/brave-core/blob/41e2cab673447bb9aa5bb2c4cbada91c456186f3/patches/chrome-installer-mac-sign_app.sh.in.patch#L19

[simonhong]

I think I fixed this by brave/brave-core@94b4894