commit 5e46a66c6d3647822de808e9265b1813b6c4bade
author Yohei Yukawa <yukawa@google.com> Wed Oct 31 14:31:35 2018 -0700
committer Yohei Yukawa <yukawa@google.com> Wed Oct 31 14:45:52 2018 -0700
tree 31f7e0aa2fd6d39a371581e4c49f598cefb197e1
parent 00e3e1b20320953ace3262340ca039e11fb56b29

Use StringJoiner in InputMethodDebug

This is a follow up CL to my previous CL [1], which added
InputMethodDebug#softInputModeToString().

It turns out that there is already a nice utility class
java.util.StringJoiner that can deal with delimiter when joining
multiple string tokens.

This CL also adds some simple unit tests for InputMethodDebug.

 [1]: I83f4795e95bc2e8ae325ad6e28d3a42317414e8d
      a468d70e5f3172123933c1585f7e9d9316d416ab

Bug: 118040692
Test: atest FrameworksCoreTests:com.android.internal.inputmethod.InputMethodDebugTest
Change-Id: I55fcdecee108b3e56bf7fd480d6f71de580dcbf6