Remove PinyinIME from build

PinyinIME in AOSP is from the GB era and incredibly ugly/unpolished. No one actually uses
it compared to Google's proprietary version and other alternatives.

Change-Id: If43045d94cd9ab0f99e5f0ec58252cd20226d86a
repopick: Allow picking batch of commits with the same Change-Id

Gerrit does allow assigning the same Change-Id for multiple commits. This patch allows picking them properly.

Change-Id: Idedc64f58eebe41a0d212c72329d15acff24efb9