Rename SubSettingLauncher.setTitle, add java doc

For make this method usage more clear,
setTitle(charSequence) rename as setTitleText,
add java doc: it is only for user generated string
setTitle(int) rename as setTitleRes.

Change-Id: I972cb6a8ff90873dfdc25c23f6dc3d68103c8e4e
Fixes: 78347436
Test: make RunSettingsRoboTests

src/com/android/settings/applications/ConvertToFbe.java

@@ -83,7 +83,7 @@ public class ConvertToFbe extends InstrumentedFragment {
     private void convert() {
         new SubSettingLauncher(getContext())
                 .setDestination(ConfirmConvertToFbe.class.getName())
-                .setTitle(R.string.convert_to_file_encryption)
+                .setTitleRes(R.string.convert_to_file_encryption)
                 .setSourceMetricsCategory(getMetricsCategory())
                 .launch();
     }