Apply fixes for EfficientStrings.

Refactoring to avoid StringBuffer synchronization overhead.

Bug: 170978902
Test: none
Exempt-From-Owner-Approval: trivial refactoring
Change-Id: Ibf843ed780c1202d5d96a11eaca889e592f19263
1 file changed
tree: 7341b3464bd8427e12e467547d32870dfd80897a
  1. core/
  2. packages/
  3. services/
  4. wifi/