Make some SubscriptionManager APIs system APIs

method public void setDefaultDataSubId(int);
method public void setDefaultSmsSubId(int);

Bug: 119232325
Test: Treehugger
Change-Id: I2775ef7a6f7f9585fe451f94da5eba541eea62af
Merged-In: I2775ef7a6f7f9585fe451f94da5eba541eea62af
(cherry picked from commit 876bb7a06581f9077ff324b091db40f47d01f689)
2 files changed