bundle id sync conn

[blagoev]

Bumps AGP versions
Don't use jcenter anymore
Fixes android build groovy scripts
Adds bundle id sync conn

[coveralls]

Pull Request Test Coverage Report for Build 5235549170

• 11 of 29 (37.93%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 88.986%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/src/native/realm_core.dart	11	29	37.93%

Files with Coverage Reduction	New Missed Lines	%
lib/src/native/realm_core.dart	1	90.07%

Totals
Change from base Build 5212207263:	-0.2%
Covered Lines:	3159
Relevant Lines:	3550

---

💛 - Coveralls

[nielsenko]

There are a lot of extra cleanup here as well, but the stuff about stamping the pubspec.yaml name attribute into the exe looks good to me, even if it seems odd we cannot read this from some standard place.

[desistefanova]

After increasing the version, there is a compile message in Android studio

The option 'android.enableR8' is deprecated.
It was removed in version 7.0 of the Android Gradle plugin.
Please remove it from `gradle.properties`.

[blagoev]

that's a warning coming from our flutter\example. I don't think it is crucial to anything