User feedback loop crash if ads are disabled or region is not supported

[tmancey]

Description

User feedback loop crash if ads are disabled or region is not supported

Steps to Reproduce

1. Change device locale to an unsupported region
2. Launch browser

Actual result:

Browser crashes

Expected result:

The browser should not crash

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Version 0.70.54 Chromium: 76.0.3809.100 (Developer Build) (64-bit)

Version/Channel Information:

• Can you reproduce this issue with the current release? N/A
• Can you reproduce this issue with the beta channel? N/A
• Can you reproduce this issue with the dev channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? N/A
• Does the issue resolve itself when disabling Brave Rewards? No
• Is the issue reproducible on the latest version of Chrome? N/A

Miscellaneous Information:

[GeetaSarvadnya]

Verification passed on

Brave	0.69.128 Chromium: 77.0.3865.75 (Official Build) (64-bit)
Revision	201e747d032611c5f2785cae06e894cf85be7f8a-refs/branch-heads/3865@{#776}
OS	Windows 10 OS Version 1803 (Build 17134.1006)

• Verified the test plan from Fixes user feedback loop crash if ads are disabled or region is not supported brave-core#3173
• Logged Ads panel disappeared from brave://rewards page after upgrade (0.68.140 to 0.69.128) #6148

Verified passed with

Brave	0.69.130 Chromium: 77.0.3865.90 (Official Build) (64-bit)
Revision	58c425ba843df2918d9d4b409331972646c393dd-refs/branch-heads/3865@{#830}
OS	macOS Version 10.13.6 (Build 17G5019)

• Verified the test plan from Fixes user feedback loop crash if ads are disabled or region is not supported brave-core#3173
• Encountered Ads panel disappeared from brave://rewards page after upgrade (0.68.140 to 0.69.128) #6148 and Brave Ads history link only shows on upgrade after an ad is served, previous history not displayed #6209

Verification passed on

Brave	0.69.130 Chromium: 77.0.3865.90 (Official Build) (64-bit)
Revision	58c425ba843df2918d9d4b409331972646c393dd-refs/branch-heads/3865@{#830}
OS	Ubuntu 18.04 LTS

• Verified the test plan from Fixes user feedback loop crash if ads are disabled or region is not supported brave-core#3173
• Encountered Ads panel disappeared from brave://rewards page after upgrade (0.68.140 to 0.69.128) #6148