Move store metadata out of source tree (#8601)

### Description

Move store metadata out of source tree. Running Triple-T publisher
always complains about our custom folders (screenshot creator script).
Move everything out of the actual Triple-T metadata folder and symlink
only the necessary ones instead.

### Checklist
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app/src/main/play/contact-email.txt

@@ -0,0 +1 @@
+../../../../store-metadata/contact-email.txt

app/src/main/play/contact-website.txt

@@ -0,0 +1 @@
+../../../../store-metadata/contact-website.txt

app/src/main/play/default-language.txt

@@ -0,0 +1 @@
+../../../../store-metadata/default-language.txt

app/src/main/play/listings

@@ -0,0 +1 @@
+../../../../store-metadata/listings

app/src/main/play/release-notes

@@ -0,0 +1 @@
+../../../../store-metadata/release-notes