tree e0d22b25670da2a61086605f304b2936fcf16bc3
parent 1cb71607bc1b02312430608d41feca88dd07012d
author Aaron Huang <huangaaron@google.com> 1584530671 +0800
committer Aaron Huang <huangaaron@google.com> 1584589104 +0800

API review: access field by method

- InvalidPacketException, public field should be a method so
  add getter to get error code.
- KeepalivePacketData, public fields should be methods so
   add getter for fields.

Bug: 151322799
Test: atest FrameworksNetTests
      atest FrameworksWifiTests
      atest FrameworksTelephonyTests: some failure in CarrierAppUtilsTest
Change-Id: Id01e6135193716cc21bba11da529bf1507a954f7