Flutter templates example app Gradle memory settings (flutter#146275)

Tries to address: flutter#146236

Author: dcharkes

packages/flutter_tools/templates/app_shared/android.tmpl/gradle.properties.tmpl

@@ -1,3 +1,3 @@
-org.gradle.jvmargs=-Xmx4G -XX:+HeapDumpOnOutOfMemoryError
+org.gradle.jvmargs=-Xmx4G -XX:MaxMetaspaceSize=2G -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
 android.enableJetifier=true

packages/flutter_tools/templates/module/android/gradle/gradle.properties.tmpl

@@ -1,3 +1,3 @@
-org.gradle.jvmargs=-Xmx4G -XX:+HeapDumpOnOutOfMemoryError
+org.gradle.jvmargs=-Xmx4G -XX:MaxMetaspaceSize=2G -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
 android.enableJetifier=true