API review: use getter to access field

Fields in KeepalivePacketData and InvalidPacketException are
changed to private and add setter/getter as API.

Bug: 151322799
Test: atest FrameworksNetTests
      atest FrameworksWifiTests
      atest FrameworksTelephonyTests: some failure in CarrierAppUtilsTest
Copy from ag/10733972
Change-Id: Id7609f2f577947909b010e7b667eaf0abfc5d917
Merged-In: Id7609f2f577947909b010e7b667eaf0abfc5d917
1 file changed
tree: 37d7717913e08dfc7613bec7b1c4989ccd1baac5
  1. service/
  2. PREUPLOAD.cfg