Chore: remove unused dependencies & improve gradle properties & code style (#1189)

* Inline version strings

* Optimize gradle

* Remove kotlin-stdlib-jdk7

* Add jvmargs in gradle.properties

* Revert "Inline version strings"

This reverts commit ad2ab2bb

* Revert asserts

core/build.gradle.kts

@@ -57,16 +57,11 @@ android {
 dependencies {
     implementation(project(":common"))
 
-    implementation(kotlin("stdlib-jdk7"))
     implementation(deps.androidx.core)
     implementation(deps.kotlin.coroutine)
     implementation(deps.kotlin.serialization.json)
 }
 
-repositories {
-    mavenCentral()
-}
-
 afterEvaluate {
     tasks.withType(GolangBuildTask::class.java).forEach {
         it.inputs.dir(golangSource)