Upgrade V8 to v7 to fix unstable sort() method

[abhayastudios]

Is your feature request related to a problem? Please describe.
As explained here for some reason until V8 version 7, the sort() was not stable, as I unfortunately experienced first hand (whereas the implementation of the iOS engine works just fine).

Describe the solution you'd like
Please upgrade the version of V8 to 7+

[darind]

@abhayastudios, we always ship NativeScript with the latest stable version of V8 for android. At the time of this writing (according to https://omahaproxy.appspot.com/) that is 6.9.427.23 and that's what we are targeting for the next release. If 7.0 hits GA before the next {N} release, we will be happy to include it. Otherwise, we will need to wait before it becomes stable. Stay tuned for updates.

[abhayastudios]

@darind cool thanks for the update!

[triniwiz]

@abhayastudios I think it drops same time chrome v70 releases which is mid oct