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
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 496baa6..0a0fd1b 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -200,7 +200,7 @@
                 .setSourceMetricsCategory(caller instanceof Instrumentable
                         ? ((Instrumentable) caller).getMetricsCategory()
                         : Instrumentable.METRICS_CATEGORY_UNKNOWN)
-                .setTitle(-1)
+                .setTitleRes(-1)
                 .launch();
         return true;
     }