AssetManager support for 3 letter lang/country codes.

- 3 letter codes are packed into the existing 32 bit locale
  field in ResTable_config
- We introduce new fields for script / variant information.

Note that we define a "match" between two ResTable_config
structures to be purely on the basis of their language &
country (disregarding the script and the variant). However,
configs with scripts and variants are considered to be more
specific than those without.

(cherry picked from commit 378c6775a62d9c461cde51f06c1b14bb014c78fd)

Change-Id: I7dce82a3fe2412834252723f458826ae41535a78
Extended locales in AAPT / AssetManager.

Support 3 letter language codes, script codes &
variants. The bulk of the changes are related to
the implementation of command line filtering of
locales etc. The previous code assumed that the
value of each "axis" (locale, density, size etc.)
could be represented by a 4 byte type. This is
no longer the case.

This change introduces a new class, AaptLocaleValue
which holds a (normalized) locale parsed from a
directory name or a filter string. This class takes
responsibility for parsing locales as well as
writing them to ResTable_config structures, which is
their representation in the resource table.

This includes minor changes at the java / JNI level
for AssetManager. We now call locale.toLanguageTag()
to give the native layer a well formed BCP-47 tag.
I've removed some duplicated parsing code in
AssetManager.cpp and replaced them with functions on
ResTable_config. The native getLocales function has
been changed to return well formed BCP-47 locales as
well, so that the corresponding java function can use
Locale.forLanguageTag to construct a Locale object
out of it.

Finally, this change introduces default and copy
constructors for ResTable_config to prevent having
to memset() the associated memory to 0 on every
stack allocation.

(cherry-picked from commit 91447d88f2bdf9c2bf8d1a53570efef6172fba74)

Change-Id: I1b43086860661012f949fb8e5deb7df44519b854
Merge "AssetManager support for 3 letter lang/country codes."
Merge "Extended locales in AAPT / AssetManager."
Move Json{Reader,Writer} test to cts.

These tests aren't really run automatically (or perhaps
even manually) in their present location, and increasing
CTS coverage is never a bad thing.

Change-Id: I81cce1211021011dca551fde62e725e177ca4df0
Merge "Move Json{Reader,Writer} test to cts."
Merge branch 'master' of https://android.googlesource.com/platform/frameworks/base into HEAD

Conflicts:
	tools/aapt/ResourceIdCache.h