This is a follow up CL for API signature change in
I772c48ff18918e48a81e807b48ff907614485c09

BUG: 17320996
Change-Id: Ic8b6162bda12bf74fae79af212c5d81c400eb9e8

BUG: 17182367
BUG: 17185263
Change-Id: Id54ca29c191b9752fa82ffe5a960113b2e97e5c1

This CL adds two convenient utility methods for
InputConnection#requestCursorAnchorInfo to encapsulate
a bit complicated parameter construction.

BUG: 16382260
Change-Id: Ib11e3bd15a4edcb602c08ff830b2fb7b34ec00da

This CL adds an compatibility library for
InputConnection#requestCursorAnchorInfo method that is supposed to
be available in L and later.

BUG: 16382260
Change-Id: I68be0c56b9fd929546e8706ccece938ae4f33339

Also, small cleanup in proguard.flags

bug: 6129704
Change-Id: If4cc694dbe74b26b1d0da301bbc321ee7afc0211

Bug: 4346045
Change-Id: Iaabdb8a148b2601bb9cbc2b08509adac164105a4

Change-Id: I3b8fdc149d350215fd4852a50456824fe3fabe0b

Change-Id: Ie69d5e90c4ee978d3ecb40b68e6466082569ca7a