Merge \"Set version to 1.0\" into nyc-dev

format _YYYY-MM-DD-HH-MM-SS_), and Shell simply propagates it as an attachment

in the `ACTION_SEND_MULTIPLE` intent.

## Version v0 (Android M)

## Version 0 (Android M)

On _Android M (Marshmallow)_, dumpstate still generates a flat

_bugreport-DATE.txt_ file, but then **Shell** creates a zip file called

_bugreport-DATE.zip_ containing a _bugreport-DATE.txt_ entry and sends that

file as the `ACTION_SEND_MULTIPLE` attachment.

## Version v1 (Android N)

## Version 1.0 (Android N)

On _Android N (TBD)_, `dumpstate` generates a zip file directly (unless there

is a failure, in which case it reverts to the flat file that is zipped by

**Shell** and hence the end result is the _v0_ format).

The zip file also contains 2 metadata entries generated by `dumpstate`:

- `version.txt`:  whose value is **v1**.

- `version.txt`:  whose value is **1.0**.

- `main-entry.txt`: whose value is the name of the flat text entry (i.e.,

  _bugreport-BUILD_ID-DATE.txt_ or _bugreport-NEW_NAME.txt_).

changes become stable.

For example, the initial version during _Android N_ development was

**v1-dev1**. When `dumpsys` was split in 2 sections but not all tools were

ready to parse that format, the version was named **v1-dev2**,

**1.0-dev1**. When `dumpsys` was split in 2 sections but not all tools were

ready to parse that format, the version was named **1.0-dev2**,

which had to be passed do `dumpsys` explicitly (i.e., trhough a

`-V v1-dev2` argument). Once that format became stable and tools

knew how to parse it, the default version became **v1-dev2**.

`-V 1.0-dev2` argument). Once that format became stable and tools

knew how to parse it, the default version became **1.0-dev2**.

Similarly, if changes in the file format are made after the initial release of

Android defining that format, then a new _sub-version_ will be used.

For example, if after _Android N_ launches changes are made for the next _N_

release, the version will be called **v1.1** or something like that.

release, the version will be called **1.1** or something like that.

Determining version and main entry

-----------------------------------------------

   version = read("version.txt")

   main_entry = read("main_entry.txt")

else

   version = v0

   version = 0

   main_entry = entries[0]

fi

```

 *

 * See bugreport-format.txt for more info.

 */

// TODO: change to "v1" before final N build

static std::string VERSION_DEFAULT = "v1-dev4";

static std::string VERSION_DEFAULT = "1.0";

bool is_user_build() {

    return 0 == strncmp(build_type, "user", PROPERTY_VALUE_MAX - 1);