This change also introduces the key background drawables which has no
fixed bottom padding.  Instead of relying on bottom padding in
drawable, this change also specifies Keyboard.verticalGap with
physical unit.  Other keyboard related length, distance and size are
also specified by physical unit.

Bug: 3066107

Change-Id: I44f3b2eef8086d6e0b0db53d38f08487549060c6

Bug: 3088257
Change-Id: I36b1a0f147c1087a98b91f00d60bf15922861f9c

bug: 3035228 This change will reduce the number of times VoiceSearch app
is called to log IME events.  This is because it 1) only
flushes the logs when there is relevant logging information
available and 2) sets a flag in UserHappinessSignals so
that other apps (eg: gmail/sms) can know if there is
relevant logging information before sending the logging
intent to voice search.

Change-Id: I708fea5a38f854091f1101e4f6a3db46296f3e92

We'll merge this to master for now, but we should have new attr (such as popupCharWidth) to handle this reasonably in the newly created BaseKeyboard class.

bug: 3082178
Change-Id: I024b946aafbbeb07b865a09f489dacb56f0478d0

Fix - "Touch again to save" not working for manually picked suggestion when re-correction is enabled.

bug: 3082806
Change-Id: I64e652b0ad1d496e102a7cc2cf9a5615df423192

To avoid a corner case of bug#3070963, in toggleShift() method of
KeyboardSwitcher, the shifted symbol keyboard will be set if current
keyboard is symbol keyboard or is not shifted symbol keyboard.

This change also implements mini keyboard cache with WeakHashMap.

Bug: 3070963
Change-Id: I868fc072e2f21bddded1622b800a53b9a6a43e91

Before this change, the verticalCorrection value was defined by "dpi"
that is relative to device screen.  This change defines the
verticalCorrection by absolute unit "in".

Bug: 3066107
Change-Id: I72c2448894a1084c582c2f1fb942b5fa8353f028

Before this change, the delay was 500 ms that came from
ViewConfiguration.getLongPressTimeout().  This change reduces the
delay to 400 ms.

Bug: 3074984
Change-Id: Ia5af5e877a3c4bb29211ef4040c728ac09a9fe85

Change-Id: Icf8fa9146cc4cbfb70d5069be5359d04c5ec2432

Follow-up to I703054c9

bug: 3063598

Change-Id: Ic9d752b8588a620b3e256fe38f3a6a0c9c093053

bug: 3058217
Change-Id: I54e29bf051b76ad27e6d653adbf14892083ad7eb

bug: 3063598
Change-Id: I703054c930590ef62579183731935ec3362406cd

Also fixed related issues below:
* Punc suggestions list was sometimes not displayed after cursor move which follows re-correction
* Punc suggestions list was disappearing with words which contains certain punc chars (but not word separator) such as ' and -

Change-Id: I36faf679321782fa8eaf318411308a4a6b89cc25

Change-Id: Ia135eb926a5f2896a480cd478d40925d46041d42

Bug: 3050703

Change-Id: I090b2bfebfb48e5ec461615d4c911024ea6d130a

Change-Id: I5240ffdd8e48bcb99c2edf878d8efaba2cafeb07

Bug: 3051311
Change-Id: Ia32cd8748a0afade07a9896ad77400cf42aed0f5

This unexpectedly bloated keys in mini popup keyboard.

bug: 3048638
Change-Id: I2b717c9007ce7717bac514f1d8bcae1280130cf4

Bug: 3050703
Change-Id: I62773c10f435d13174f6ff6574912cb99303e83c

- Make the background of popup key a full transparent color
- Updated the background mdpi asset of keyboard

Bug: 2975027
Bug: 3048638

Change-Id: I8709a1ca403e5c3f862a8be9be1668d30c7687f8

Bug: 3004696
Change-Id: Icc5bdd6945f3bf79f7234a0227d8036d6f6d4c1d

Bug: 3002817
Change-Id: I099dd63e58d5159a609c1d934dbb6f5aab914305

Change-Id: Ib3effaa6f4e8cfc3951ab5d5d099335fd3856a2f

Bug: 3048642
Bug: 3004920
Change-Id: Ibfb495a246c9e2da6ebf3c03d10ed8acff00f54b

Change-Id: I26a639aea0e0b11ba65d621696c42e861847498e

Bug: 3004827
Change-Id: I00e9d925fcf17fa9f7a9aefe6572a648e023be11

This change also fixes tha the touch slop value is applyed only for
initial movement of scrolling suggestion bar.

Bug: 3004920
Change-Id: I62afdedc210156e41e8c84c48cade442f9d5a1aa

Bug: 3038861
Change-Id: I94011ca80710ff6eb24e940104f7d9d3bb86840a

Bug: 3040529
Change-Id: I8e3cc635737224537a019e66c38e1e2ea7a8bb8b

This change refactors a key index and pointer position variables into
a separate static inner class KeyState . This change also disables
time debouncing.

Bug: 3033737
Change-Id: Ie4fc37316c260330d8f0861e0771ea903a99cfce

Change-Id: I30fdac74685beae06b5c61140452b26b29ae4c39