Add additional structure to output logs to group entries by optional fields.

The new format has time, time as int, and the new logGroup code
    (m=motionEvent, k=key, s=statechange, c=correction)
    followed by additional text whose format depends on the logGroup code.

The additional text will be cleaned up in later CL's.

20120321-170548.067+0900        1332317148067   m
[Down]143116235,0,691,378,0.40000004,0.435
20120321-170548.133+0900        1332317148133   m
[Up]143116302,0,691,378,0.40000004,0.435
20120321-170548.146+0900        1332317148146   k       <enter> 691     378
20120321-170602.485+0900        1332317162485   s
[onStartInputView]com.socialnmobile.dictapps.notepad.color.note,2131624043,147457,1140850694
20120321-170606.508+0900        1332317166508   m
[Down]143134679,0,40,154,0.4666667,0.64
20120321-170606.567+0900        1332317166567   m
[Move]143134723,0,42,154,0.4666667,0.765
20120321-170606.577+0900        1332317166577   m
[Move]143134746,0,44,154,0.4666667,0.775
20120321-170606.652+0900        1332317166652   m
[Up]143134824,0,44,154,0.4666667,0.775
20120321-170606.662+0900        1332317166662   k       A       40      154
20120321-170607.200+0900        1332317167200   m
[Down]143135372,0,411,390,0.53333336,0.585
20120321-170607.311+0900        1332317167311   m
[Up]143135483,0,411,390,0.53333336,0.585
20120321-170607.313+0900        1332317167313   c       [----]A

Bug: 6188932
Change-Id: I8694eb9016d8cf0389ef582f6c7d2820aa4d2c92