fix: use AndroidManifest.xml for older RN versions (#431)

### Summary

The React Native CLI relies on the filename `AndroidManifest.xml` to be
able parse the package name. But we were using
`AndroidManifestLegacy.xml` instead which broke the lib for older RN
versions (AGP 7). This change makes it so that we use
`AndroidManifest.xml` for older RN versions and `AndroidManifestNew.xml`
for newer RN versions.

Fixes #429

### Test plan

- Create an app with RN 0.68 and install the library without these
changes - see that `yarn android` fails
- Create an app with RN 0.68 and install the library with these changes
- see that `yarn android` succeeds
- Create an app with latest RN and install the library with these
changes - see that `yarn android` succeeds

packages/create-react-native-library/templates/native-common/android/build.gradle

@@ -80,10 +80,10 @@ def supportsNamespace() {
 android {
   if (supportsNamespace()) {
     namespace "com.<%- project.package -%>"
-  } else {
+
     sourceSets {
       main {
-        manifest.srcFile "src/main/AndroidManifestDeprecated.xml"
+        manifest.srcFile "src/main/AndroidManifestNew.xml"
       }
     }
   }

packages/create-react-native-library/templates/native-common/android/src/main/AndroidManifest.xml

@@ -1,2 +1,3 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.<%- project.package -%>">
 </manifest>

packages/create-react-native-library/templates/native-common/android/src/main/AndroidManifestDeprecated.xml → packages/create-react-native-library/templates/native-common/android/src/main/AndroidManifestNew.xml

@@ -1,3 +1,2 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="com.<%- project.package -%>">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 </manifest>