Initial commit

This initial commit includes HUSH specific changes starting at this commit:
d14637012c

app/proguard-rules.pro

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+-dontobfuscate
+-keepattributes SourceFile,LineNumberTable
+
+# Reports
+-printusage build/outputs/logs/R8-removed-code-report.txt
+-printseeds build/outputs/logs/R8-entry-points-report.txt
+
+## Okio
+# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java
+-dontwarn org.codehaus.mojo.animal_sniffer.*
+
+#-keep class cash.z.** { *; }