refactor: deprecate displayName, use name property (Android)

[itsLucario]

Google SignIn result return "displayName" (Basically full name) but the User container property "name" which is never populated.
Ref:

CapacitorGoogleAuth/android/src/main/java/com/codetrixstudio/capacitor/GoogleAuth/GoogleAuth.java

Line 116 in 2b73c09

user.put("displayName", account.getDisplayName());

closes #73

[reslear]

good, maybe better to rename displayName -> name for Android and deprecate displayName for backward compatibility:

• web name: https://github.com/CodetrixStudio/CapacitorGoogleAuth/blob/2b73c096f894ad27b5c0c06ca704d4c4c408d2d0/src/web.ts#L144C30-L144C30
• ios name: https://github.com/CodetrixStudio/CapacitorGoogleAuth/blob/2b73c096f894ad27b5c0c06ca704d4c4c408d2d0/ios/Plugin/Plugin.swift#L154C16-L154C16
• android displayName:

  CapacitorGoogleAuth/android/src/main/java/com/codetrixstudio/capacitor/GoogleAuth/GoogleAuth.java

  Line 116 in 2b73c09

  user.put("displayName", account.getDisplayName());

closes #73
first mention: #10 (comment)

[reslear]

@itsLucario congratulations thanks for your contribution ;)