Remove StringUtil import from the whole project

Author: spetrescu84

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/AccessApiFragment.kt

@@ -9,7 +9,6 @@ import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
 import com.azuresamples.msalnativeauthandroidkotlinsampleapp.databinding.FragmentAccessApiBinding
-import com.microsoft.identity.common.java.util.StringUtil
 import com.microsoft.identity.nativeauth.INativeAuthPublicClientApplication
 import com.microsoft.identity.nativeauth.parameters.NativeAuthGetAccessTokenParameters
 import com.microsoft.identity.nativeauth.parameters.NativeAuthSignInParameters
@@ -110,7 +109,7 @@ class AccessApiFragment : Fragment() {
             val actionResult: SignInResult = authClient.signIn(signInParameters)
 
             binding.passwordText.text?.clear()
-            StringUtil.overwriteWithNull(password)
+            password.fill('\u0000')
 
             when (actionResult) {
                 is SignInResult.Complete -> {

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/EmailAttributeSignUpFragment.kt

@@ -8,7 +8,6 @@ import android.view.ViewGroup
 import android.widget.Toast
 import androidx.fragment.app.Fragment
 import com.azuresamples.msalnativeauthandroidkotlinsampleapp.databinding.FragmentEmailAttributeBinding
-import com.microsoft.identity.common.java.util.StringUtil
 import com.microsoft.identity.nativeauth.INativeAuthPublicClientApplication
 import com.microsoft.identity.nativeauth.UserAttributes
 import com.microsoft.identity.nativeauth.parameters.NativeAuthGetAccessTokenParameters
@@ -111,7 +110,7 @@ class EmailAttributeSignUpFragment : Fragment() {
             val actionResult: SignUpResult = authClient.signUp(parameters)
 
             binding.passwordText.text?.clear()
-            StringUtil.overwriteWithNull(password)
+            password.fill('\u0000')
 
             when (actionResult) {
                 is SignUpResult.CodeRequired -> {

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/PasswordResetNewPasswordFragment.kt

@@ -9,7 +9,6 @@ import android.widget.Toast
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import com.azuresamples.msalnativeauthandroidkotlinsampleapp.databinding.FragmentPasswordBinding
-import com.microsoft.identity.common.java.util.StringUtil
 import com.microsoft.identity.nativeauth.parameters.NativeAuthSignInContinuationParameters
 import com.microsoft.identity.nativeauth.statemachine.errors.ResetPasswordSubmitPasswordError
 import com.microsoft.identity.nativeauth.statemachine.errors.SignInContinuationError
@@ -60,7 +59,7 @@ class PasswordResetNewPasswordFragment : Fragment() {
 
             val actionResult: ResetPasswordSubmitPasswordResult = currentState.submitPassword(password)
             binding.passwordText.text?.clear()
-            StringUtil.overwriteWithNull(password)
+            password.fill('\u0000')
 
             when (actionResult) {
                 is ResetPasswordResult.Complete -> {

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/WebFallbackFragment.kt

@@ -15,7 +15,6 @@ import com.microsoft.identity.client.AuthenticationCallback
 import com.microsoft.identity.client.IAccount
 import com.microsoft.identity.client.IAuthenticationResult
 import com.microsoft.identity.client.exception.MsalException
-import com.microsoft.identity.common.java.util.StringUtil
 import com.microsoft.identity.nativeauth.INativeAuthPublicClientApplication
 import com.microsoft.identity.nativeauth.parameters.NativeAuthSignInParameters
 import com.microsoft.identity.nativeauth.statemachine.errors.GetAccountError
@@ -96,7 +95,7 @@ class WebFallbackFragment : Fragment() {
             val actionResult: SignInResult = authClient.signIn(parameters)
 
             binding.passwordText.text?.clear()
-            StringUtil.overwriteWithNull(password)
+            password.fill('\u0000')
 
             if (actionResult is SignInError && actionResult.isBrowserRequired()) {
                 Toast.makeText(requireContext(), actionResult.errorMessage, Toast.LENGTH_SHORT)