Use PrefService Java class for local state prefs from BravePrefServiceBridge

[AlexeyBarabash]

Follow-up for brave/brave-core#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: brave/brave-core#16486 (comment)

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