feat: allow passing executor parameters to build jobs

src/jobs/android_build.yml

@@ -1,7 +1,5 @@
 description: Builds the Android app at the given path with the given build types.
 
-executor: linux_android
-
 parameters:
   # For this job
   checkout:
@@ -49,6 +47,24 @@ parameters:
     description: Configure the android tests to run. Defaults to assembleAndroidTest
     type: string
     default: assembleAndroidTest
+  java_options:
+    description: Java command options. Note that setting this will override the default options so you might need to supply those as well.
+    type: string
+    default: '-Xmx1024m -XX:+UnlockExperimentalVMOptions -XX:+UseContainerSupport'
+  gradle_options:
+    description: Gradle command options. Note that setting this will override the default options so you might need to supply those as well.
+    type: string
+    default: '-Xmx2014m -Dorg.gradle.daemon=false -Dorg.gradle.jvmargs="-XX:+UnlockExperimentalVMOptions -XX:+HeapDumpOnOutOfMemoryError"'
+  resource_class:
+    description: Changes the resource class of the executor. Requires a support request to enable the resource_class parameter. See https://circleci.com/docs/2.0/configuration-reference/#resource_class
+    type: string
+    default: medium
+
+executor:
+  name: linux_android
+  java_options: <<parameters.java_options>>
+  gradle_options: <<parameters.gradle_options>>
+  resource_class: <<parameters.resource_class>>
 
 steps:
   - when:

src/jobs/ios_build.yml

@@ -1,7 +1,5 @@
 description: Builds the iOS app at the given path with the given build scheme
 
-executor: macos
-
 parameters:
   # For this job
   checkout:
@@ -73,6 +71,19 @@ parameters:
     description: Should we run brew update? Defaults to true
     type: boolean
     default: true
+  xcode_version:
+    description: The version of Xcode to use. See here for the list of supported versions https://circleci.com/docs/2.0/testing-ios/#supported-xcode-versions
+    type: string
+    default: "12.4.0"
+  resource_class:
+    description: Changes the resource class of the executor. Requires a support request to enable the resource_class parameter. See https://circleci.com/docs/2.0/configuration-reference/#resource_class
+    type: string
+    default: medium
+
+executor:
+  name: macos
+  xcode_version: <<parameters.xcode_version>>
+  resource_class: <<parameters.resource_class>>
 
 steps:
   - when: