[Android] Improve UI for private tabs reauth feature

[samartnik]

Description

We want to replace this icon https://source.chromium.org/chromium/chromium/src/+/main:chrome/android/java/res/drawable/ic_incognito_reauth_promo_icon.xml

We want to revisit these UI's

Steps to reproduce

Actual result

Expected result

Issue reproduces how often

Version/Channel Information:

• Can you reproduce this issue with the current Play Store version?
• Can you reproduce this issue with the current Play Store Beta version?
• Can you reproduce this issue with the current Play Store Nightly version?

Device details

• Install type (ARM, x86):
• Device type (Phone, Tablet, Phablet):
• Android version:

Brave version

Website problems only

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Additional information

[aguscruiz]

Design ready here:
https://www.figma.com/file/6KPhbe8yqCPOLgFT2AYlju/Private-nav---Application-lock?node-id=1%3A2&t=akjs30qOI2MTM5UX-1

[CodeCubeNeo]

Any updates on this?

[anthonypkeane]

Pls use the UI from brave/brave-ios#7810

https://bravesoftware.slack.com/archives/C03MMJ4CHEZ/p1697045882833449

[samartnik]

So here we just updated icons and buttons to match Figma to unlock the feature itself. Private tab UI overhaul will be done as a separate task #33949

[GeetaSarvadnya]

Verification PASSED on Vivo X70 Pro version 12 running Bravemonoarm64.apk_1.62.121

• Verified the designs from [Android] Improve UI for private tabs reauth feature #29688 (comment)
• Logged a follow up Unlock private button color is not as per the design and lock icon is missing in the button  #35056

Example	Example	Example	Example

When a private tab locked/unlocked and no regular tabs are opened

Example	Example	Example	Example	Example	Example	Example

When a private tab locked/unlocked and a regular tabs is opened

Example	Example	Example	Example	Example	Example	Example	Example