This is a groundwork for enabling LocaleSpan.

To enable LocaleSpan everywhere, we need to switch to
CharSequence from String so that Span infromation can be
preserved end-to-end.  To achieve this, we need to have
CharSequence version of String#split.

BUG: 16029304
Change-Id: I0dd103185dcf62fb1e25054a374340790e6a4678

- Move util classes that are unused in AOSP
- Remove unused methods

Change-Id: Ic97fd313f1e2bafd50609d42aa3a2d090b63eafc

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

This is a followup CL of Ic0268fd128.

Bug: 15318007
Change-Id: I3cd78d6db4030c558b9277ceaaf8ea76b9acdc66

Change-Id: I5da2dbf8828fa0e176e7c2496392a5f561ebfe20

Bug: 15318007
Change-Id: Ic0268fd12865c9a692a5e7110a9beb76cb8b6d7f

Bug: 15782668
Bug: 15436349
Change-Id: Idbf98933e60531dbddb9450c6dbe7c4e2492cbd5

This is a follow up of I1f7214c689.

Bug: 15781377
Change-Id: I7289b8b724e086da80ab3849cc567560c1a8502d

Bug: 16226064
Change-Id: Ice28fc20680889a4053c5d20c88dd744a0f7297e

bug: 16213554
Change-Id: Icd67ed4fd57fcc5f5bf8039b7892d0d446210247

Bug: 16213554
Bug: 16235703
Change-Id: Ib29b1a84b4c6ebae06d3dc6448f3c274ec6a7aab
(cherry picked from commit 1d6024d2)

Bug: 15781377
Change-Id: I1f7214c689006b1088249783eb614b6f0fbf2ee7

Bug: 16208129
Change-Id: I34ba531bcdd9b18b3b84c78cf0cd9cae439ecd5d

Change-Id: I2d54f477d9b341e944e265786a734f23d152bb81

Bug: 13664080
Change-Id: I34c9d8046b339c9b855be378a5fad907382d1359

This CL also fixes a bug of pressed state color of suggestions strip
in Material Light theme.

Bug: 16208167
Change-Id: I4315893bd129f65f34c863b003c8b2cfab4d2d84

Bug: 16080988
Change-Id: I8638a26370bbe2abf5dfcd9f40200b57264f5c0b

Bug: 13689011
Bug: 13630847
Change-Id: I9930d5ce9cbe16489dc69f68b9590d72afe463b5

Suggestions have been sorted in SuggestionResults.

Bug: 13689011

Change-Id: Iec21e97119ceb7c71673d5b15bb1f06040b59fef

Bug: 13630847
Change-Id: I07d17ccf5ce0755f63a0b8d236d77600baaf62b6

Bug: 16143083
Bug: 15678940
Bug: 15680164
Change-Id: I9f2527a8a536aab05d961e619e3940603024385c

Bug: 15782668
Change-Id: Id2ae47cfb2065d73f13701b9c6a041129dfd08ae

This CL simplifies the wrapper method for
TextInfo#getCharSequence() because in the almost all cases we want
to use the result of TextInfo#getText() as the default value.

BUG: 16029304
Change-Id: I62f987aed8ca42b093255e6c0703d6120fa01299

Bug: 15782668
Change-Id: If3f2439fe9dcd2c05514e73861777337b42273c4

Bug: 7963632
Change-Id: I478ecdc3b7409ccd8dc729da28ad4816a2eda75e

This is a follow up CL for Iafbf2877db393dbd040295c21d.

BUG: 16029304
Change-Id: I0bfdcf901adb3178e6b9201d598ce9f588dcd253

Bug: 10029252
Bug: 10028759
Change-Id: Iea9cc1b7cafa97280503b0236b005cea57ba2c3d