Partially reverting Ie033d21ef8 to populate root node info.

This CL also fixes the bounds in screen of virtual node info.

Bug: 15746768
Bug: 15582251
Change-Id: I3a82f904270adf138036ef462fd70b349a3cd33e

Change-Id: I62ec07210817295f59a174383ee4b33cc4fc2ca6

Bug: 15555552
Bug: 15552347
Change-Id: Ia4d8c79d079e3ce233d46d4bbad4fff1be5c5c39

It should be disabled when it is empty. But should be enabled even
when it is empty with accessibility exploration on to avoid announcing
"disabled".

Note that this CL may not be able to handle "suspending talk back"
state correctly. It should be handled by registering
TouchExplorationStateChangeListener that is available from API 19.

Bug: 15738513
Bug: 14849593
Change-Id: Id9ad89f770840f74a106f53833060407b20c1e24

Bug: 15727301
Change-Id: Id7002ecb7f4eea7be3505f6f0235074264418221

Bug: 15709298
Change-Id: I1b3fff3152960d85060149727d7a3422fea8a0bd

Bug: 15709298
Change-Id: I05d9433d4e1c2cc475a2136cc97bc32bde6fc745

Change-Id: I12139a925d59bb467df629cebc61423d61db1d2d

Change-Id: I0ac92c56bdb636998f7f5e20fba6830b4ac435fa

Bug: 15677822
Change-Id: Ibebb215a08795482c0f1eef965db06af57558906

Bug: 14161647
Change-Id: Ic7d53464bd051bffc8c7f8d097325321fe0aaee7

Bug: 14161647
Change-Id: Ia5f985ea467145fb381e3ad2c1f67f3b013f19e8

We need to update them after separator-space, and also when
the user presses shift and they are displayed.

Bug: 15554503
Change-Id: I5596163d5cd94d3cc5f6af10a1ab2cc74b6d4279

Bug: 15554503
Change-Id: If5e8c0d94ed26d929400ccbb0d45ac23dd98d180

This CL also supports announcing dismissing of a more keys keyboard.

Bug: 15582905
Change-Id: Ia9e5d6c7e3e23dac39ee570b20d32f0141ae6184

Bug: 15603590
Change-Id: Ia2ac28a2dbf3e07678661d59e0aa6b4e6a536a02

Bug: 15579941
Change-Id: I25c19068ae4ad26b1ff64ffccf36ef8dd58ed295

Because EmojiPageKeyboardView doesn't use PointerTracker to handle
MotionEvent, a dedicated accessibility delegate is needed. Then the
recent tab can be updated even with accessibility mode on.

Bug: 15582599
Change-Id: I63d75b9aca21ec44f1f77d2eaaf2ba7813992183

Because a keyboard handling hover events and determining a virtual
node by itself, there is no need to supply whole virtual nodes info
for the keyboard. Just returning an empty accessibility node info
supresses annoucements of all keys.

This CL also fixes the undefined virtual id value.

Bug: 15582251
Change-Id: Ie033d21ef878d272417cf2b20f8eec1e516587f6

A more keys keyboard may have a divider on it. The MoreKeysDetector
should be used even with accessibility mode on to be able to handle a
divider.

Bug: 15583354
Change-Id: Ife2cf8304496c4c330127fde8ca1f34c2f0838e2

Change-Id: Ia2f8d5640cde816cca23b26ee261acf44f3cdcdc

Bug: 14161647
Change-Id: I2111f841c94e31d62b670da4236fc738df03a708

Bug: 14161647
Change-Id: I8106419678d5d26a4debec7bbef43af079c1ab18

Bug: 14161647
Change-Id: I7ab3d701525e9a19bc100aa577527e332bb2ad95

Bug: 15300452

Change-Id: Ic6c91c47453e19fb5db2c62b66659619e72b1ecf

This reverts commit 1690992d.

Build.VERSION.SDK_INT is bumped with I4716e71d72b2526fe635079d1b.                                                                                     
We no longer need this workaround.

Change-Id: I75a1c2a7055af17a7d40291aadd62ae9bb42e056

Bug: 15579928
Change-Id: I6bcf885f2c1aa37b337a85978409ccf41e459c2a

Bug: 14161647
Bug: 14119293
Change-Id: I0c00f13966db88e4de85e245e7bced43c9d474b2

Bug: 15552347
Change-Id: Iadcdc73d3335d561a27b9314d3fcdab0b0c96e49

With accessibility mode on, hover events for a more keys keyboard are
handled among MoreKeysKeyboardAccessibilityDelegate and
MoreKeysKeyboardView. But the more keys keyboard is shown by
MainKeyboardAccessibilityDelegate that uses PointerTracker to handle
hover events. Thus we need to clear PointerTracker state when the more
keys keyboard is dismissed.

This is a workaround to resolve the issue. We should reconsider the
structure of those views and accessibility delegates in the future.

Bug: 15583751
Change-Id: Ida8c3e55194c59bdaa5bc4ff06068e699b888ced

Bug: 15557070
Change-Id: I5796df54a74c111d361da8c548e5597aba8e24d0

Bug: 15531465
Change-Id: Ic7fe5743ad3767cdaed699e5e2d1ebcaa75e22c2

This adds "Dump contextual dictionary".

Bug: 14161647
Change-Id: I41a6d6e131d9d8c300ac0120d903d46d88bb3346

Special case <valid word>.<valid word> to send as a suggestion
the same string where the periods is replaced by a space.

Bug: 10780091
Change-Id: I43c94675977f9ab5d7ee5671486cb742b39f3974

Change-Id: Ib0150b3306bb2db8aff443d1158fecc8464cbbdb

Bug: 13630847
Change-Id: Ib4513b8cb6981e01dd33fd9703cc01646a2c7ccc

Change-Id: Ibf0a4e01e1abc81b09aec104ba39d2ec18f4db8b

Change-Id: I21a4219f682f43f4a84b1ab12d00dd930b35caa1

This member has outlived its usefulness. It's not clear now that it
makes things really faster, but it does bring a lot of complexity
that we can avoid by removing it.

Change-Id: Ifbc8094a45b56b958fe165b1930f4cc358a97721

Bug: 15378862
Change-Id: Ia14929bd9eb63ad5735cae0ad98ad0e2ad301128