Make speaker button on pinned tabs un-clickable

[bsclifton]

Test plan

See brave/brave-core#4076

Description

Follow up for #2025

Steps to Reproduce

1. Play a music video on YouTube or a music stream on your favorite site
2. Pin the tab
3. Try to switch to and from that pinned tab without muting tab

Actual result:

Tab is accidentally muted because the click area is extremely tiny, since most of the hit box is for the mute button

Expected result:

Should be able to switch to the pinned audio tab without muting

Reproduces how often:

Brave version (brave://version info)

0.69.x and higher

[bsclifton]

Related #5837 (comment)

[eljuno]

+1 from Community https://community.brave.com/t/remove-the-sound-icon-on-a-pinned-tab/94643?u=eljuno

[whitespacecode]

+1 Really frustrating!!

[btlechowski]

Verification passed on

Brave	1.3.81 Chromium: 79.0.3945.88 (Official Build) beta (64-bit)
Revision	c2a58a36b9411c80829b4b154bfcab97e581f1f3-refs/branch-heads/3945@{#954}
OS	Ubuntu 18.04 LTS

Verified test plan from the description. Also verified that the speaker button is clickable on normal tabs.

Verification passed on

Brave	1.3.85 Chromium: 79.0.3945.88 (Official Build) beta (64-bit)
Revision	c2a58a36b9411c80829b4b154bfcab97e581f1f3-refs/branch-heads/3945@{#954}
OS	Windows 10 OS Version 1803 (Build 17134.1006)

• Verified the test plan from Make speaker icon on pinned tab un-clickable brave-core#4076
• Verified the description from the issue
• Verified on both clean and upgraded profile
  

Verified passed with

Brave	1.3.88 Chromium: 79.0.3945.117 (Official Build) beta (64-bit)
Revision	04f0a055010adab4484f7497fbfdbf312c307f1d-refs/branch-heads/3945@{#1019}
OS	macOS Version 10.14.6 (Build 18G103)

• Verified the test plan from Make speaker icon on pinned tab un-clickable brave-core#4076
• Verified the description from the issue.
• Verified speaker button is clickable on un-pinned tabs
• Verified if you un-pin a tab the speaker becomes clickable again.

[saasseckin]

I was using that :(
Is expanding pinned tab when you hover over it not an option? @bsclifton

[bsclifton]

@saasseckin I don't think so, unfortunately. But it will show Mute Site when you right click the pinned tab. Not as easy, but at least it's still possible

[User198263321]

Please just add an option or flag to disable it in brave://flags

[snintendog]

Please just add an option or flag to disable it in brave://flags

This should be a default for ALL Features no matter what.