Prevent auto downloading & opening a PDF file on click

[chkk525]

Description

• Currently, when a user clicks a link to a PDF file, it'll be downloaded and opened in an associated app without confirming.
• For security reasons, some users want to prevent it

Steps to reproduce

1. On Android, click https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf

Actual result

It'll be downloaded and opened in a default PDF viewer app.

Expected result

• Allow them to prevent it as an option menu

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

[samartnik]

Test plan 1:

1. Without changing anything, click https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf
2. Pdf should be opened automatically (same behavior as before)

Test plan 2:

1. Go to Downloads settings
2. Turn off Automatically open when possible
3. Click https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf
4. Pdf file should be just downloaded, without opening

[srirambv]

Verification passed on OnePlus 6T with Android 10 running 1.19.74 x64 build

• Verified test plan from Prevent auto downloading & opening a PDF file on click  #12902 (comment)

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Verification passed on Samsung Tab A with Android 10 running 1.19.74 x64 build

• Verified test plan from Prevent auto downloading & opening a PDF file on click  #12902 (comment)