This CL a logical revert of a previous CL [1], which separated Java
files into common ones and overridable ones. Now that that overriding
concept is no longer used, there is no need to keep having separate
directory structure.
[1]: Ic734bd4d20aa050c688a3158b1a382ae0ac18991
fb74ab15c1343084740d65ef8744cad33a678e82
Fix: 79323502
Test: make -j aosp_taimen-userdebug && make -j
Test: tapas LatinIME && make -j
Change-Id: I2090bc25d18e6d4f24e91c2cbfe832755cbb4e8f
With this CL, the implementation of StatsUtils no longer
needs to know how to read settings from the system.
Insted, the LatinIME class is now responsible for notifying
StatsUtils whenever the settings is changed.
BUG: 14324207
Change-Id: Ic3d26ec31c8d2c082d3e7487b578b323aad2f960
