Settings: Correctly align cursor in Settings

Steps to Reproduce:
- Click on Density Settings (DPI Settings) / Renaming BT Device / Renaming SIM Settings
- EditText Dialog pops up
- The cursor is at the leftmost side of the text
- Logically Cursor should be at rightmost side which can be aligned grabbing text length

Screenshots:
Before:
http://imgur.com/a/o4vkr
http://imgur.com/a/6Qext

After:
http://imgur.com/a/fuxqT
http://imgur.com/a/vm2WX

Bug: 65185652
Test: RunSettingsRoboTests: OK (47 tests)

Change-Id: Id00308e7e019434edad4afab56cf4719be0d0d54
Signed-off-by: PMS22 <prathams99@rediff.com>

tests/robotests/src/com/android/settings/UtilsTest.java

@@ -25,6 +25,8 @@ import android.os.storage.VolumeInfo;
 import android.text.SpannableStringBuilder;
 import android.text.format.DateUtils;
 import android.text.style.TtsSpan;
+import android.widget.EditText;
+import android.widget.TextView;
 
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 import com.android.settings.wrapper.DevicePolicyManagerWrapper;
@@ -325,4 +327,15 @@ public class UtilsTest {
         assertThat(Utils.isProfileOrDeviceOwner(mUserManager, mDevicePolicyManager,
                 PACKAGE_NAME)).isTrue();
     }
+
+    @Test
+    public void testSetEditTextCursorPosition_shouldGetExpectedEditTextLenght() {
+        final EditText editText = new EditText(mContext);
+        final CharSequence text = "test";
+        editText.setText(text, TextView.BufferType.EDITABLE);
+        final int length = editText.getText().length();
+        Utils.setEditTextCursorPosition(editText);
+
+        assertThat(editText.getSelectionEnd()).isEqualTo(length);
+    }
 }