iOS Swift Conversion (#2527)

Converts iOS implementation from Objective-c to Swift

# During the conversion process some updates to the code structure were also made
- Modularize codebase from single file to smaller focused files
- Untangled large nested IF statements
- Added more null checks, since Swift is more strict with null pointers
- Added property to allow for decoding of local video sources with self contained key for offline playback
- Updates example apps to test react-native 0.63.4 and uses auto native dependency imports for android and ios

examples/basic/android/app/BUCK

@@ -1,5 +1,3 @@
-import re
-
 # To learn about Buck see [Docs](https://buckbuild.com/).
 # To run your application with Buck:
 # - install Buck
@@ -10,57 +8,48 @@ import re
 # - `buck install -r android/app` - compile, install and run application
 #
 
-lib_deps = []
-for jarfile in glob(['libs/*.jar']):
-  name = 'jars__' + re.sub(r'^.*/([^/]+)\.jar$', r'\1', jarfile)
-  lib_deps.append(':' + name)
-  prebuilt_jar(
-    name = name,
-    binary_jar = jarfile,
-  )
+load(":build_defs.bzl", "create_aar_targets", "create_jar_targets")
 
-for aarfile in glob(['libs/*.aar']):
-  name = 'aars__' + re.sub(r'^.*/([^/]+)\.aar$', r'\1', aarfile)
-  lib_deps.append(':' + name)
-  android_prebuilt_aar(
-    name = name,
-    aar = aarfile,
-  )
+lib_deps = []
+
+create_aar_targets(glob(["libs/*.aar"]))
+
+create_jar_targets(glob(["libs/*.jar"]))
 
 android_library(
-  name = 'all-libs',
-  exported_deps = lib_deps
+    name = "all-libs",
+    exported_deps = lib_deps,
 )
 
 android_library(
-  name = 'app-code',
-  srcs = glob([
-    'src/main/java/**/*.java',
-  ]),
-  deps = [
-    ':all-libs',
-    ':build_config',
-    ':res',
-  ],
+    name = "app-code",
+    srcs = glob([
+        "src/main/java/**/*.java",
+    ]),
+    deps = [
+        ":all-libs",
+        ":build_config",
+        ":res",
+    ],
 )
 
 android_build_config(
-  name = 'build_config',
-  package = 'com.videoplayer',
+    name = "build_config",
+    package = "com.videoplayer",
 )
 
 android_resource(
-  name = 'res',
-  res = 'src/main/res',
-  package = 'com.videoplayer',
+    name = "res",
+    package = "com.videoplayer",
+    res = "src/main/res",
 )
 
 android_binary(
-  name = 'app',
-  package_type = 'debug',
-  manifest = 'src/main/AndroidManifest.xml',
-  keystore = '//android/keystores:debug',
-  deps = [
-    ':app-code',
-  ],
+    name = "app",
+    keystore = "//android/keystores:debug",
+    manifest = "src/main/AndroidManifest.xml",
+    package_type = "debug",
+    deps = [
+        ":app-code",
+    ],
 )