Use PrefService Java class for local state prefs from BravePrefServiceBridge

[AlexeyBarabash]

Follow-up for https://github.com/brave/brave-core/pull/16386

Edit BravePrefServiceBridge for local state based prefs is not perfect by following reasons:

• it requires add new methods in two files;
• it's easy to make mistake.

The good solution would be to re-use Chromium PrefService class and auto-generated pref names, which is now done for profile-based prefs.

[Uni-verse]

Verified on Samsung Galaxy S21 using version:

Brave   1.48.157 Chromium: 110.0.5481.77 (Official Build) (64-bit) 
Revision    65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS  Android 13; Build/TP1A.220624.014

Test Plan: https://github.com/brave/brave-core/pull/16486#issue-1513225161

brave.p3a.enabled

1. Ensured that unchecking P3A in the onboarding flow will show below in `brave://local-state` ``` "p3a": { "enabled": false, ``` 2. Ensured that enabling P3A switch in privacy settings will display below in `brave://local-state` 3. Ensured that relaunching the browser does not reset the P3A preference in the settings ``` "p3a": { "enabled": true, ``` Step 1 | Step 2 -|-  | 

brave.stats.reporting_enabled

1. Ensured that turning off `Automatically send daily usage pings` in privacy settings will display `reporting_enabled: false` follow in `brave://local-state` 2. Ensured that relaunching the browser does not reset the setting Example | Example -|-  | 

safetynet.status

1. Ensured that the Brave Rewards grant should is retrieved successfully to verify it works as before.

brave.unstoppable_domains.resolve_method

1. Ensured that enabling Unstoppable Domains in privacy settings will display below in local-state ``` "unstoppable_domains": { "resolve_method": 3 }, ``` 2. Ensured that relaunching the browser does not reset the setting Example | Example -|-  | 

brave.ens.resolve_method

1. Ensured that enabling Ethereum Name Service in privacy settings will display the following under `brave://local-state` ``` "ens": { "resolve_method": 3 }, ``` 2. Ensured that relaunching the browser does not reset the setting Example | Example -|-  | 

brave.sns.resolve_method

1. Enable `Solana Name Service` in `brave://flags` 2. Ensured `Solana Name Service` shows up in the privacy settings 3. Ensured enabling SNS will display the following in `brave://local-state` ``` "sns": { "resolve_method": 3 }, ``` Example | Example | Example -|-|-  |  | 

brave.ens.offchain_resolve_method

1. Enable ENS offchain lookup under Ethereum Name Service in the privacy settings 2. Check brave://localstate to ensure that the follow log is displayed ``` "ens": { "offchain_resolve_method": 2, ``` 3. Relaunch browser to make sure setting preference is retained Example | Example -|-  |