Use shared constants in mojom in Solana instruction decoding

[yrliou]

Android version of brave/brave-ios#6967.

We have some constants newly added in mojom to support checking param name during Solana instruction decoding in the UI side (#28578).
brave/brave-core@d0011d9#diff-9f2cf11d57c8efee5461b92cdb38fa327b70c25fd8d009f7692049e8e88944a8R1602-R1612

This issue is for Android to update the current code to use these new shared constants if possible.
I only did a quick search so there might have more occurrences other than below.

1. https://github.com/brave/brave-core/blob/master/android/java/org/chromium/chrome/browser/crypto_wallet/util/WalletConstants.java#L76-L80
2. https://github.com/brave/brave-core/blob/master/android/java/org/chromium/chrome/browser/crypto_wallet/util/WalletConstants.java#L95-L100 (this one is not included in 17267, but would be added by https://github.com/brave/brave-core/pull/17128/files#diff-9f2cf11d57c8efee5461b92cdb38fa327b70c25fd8d009f7692049e8e88944a8R913-R918.
3. solanaInstructionAccountParam.name.equalsIgnoreCase("signers"); in SolanaInstructionPresenter.java.

cc @Pavneet-Sing