build: update fragment to 1.2.4

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

build.gradle

@@ -20,7 +20,7 @@ buildscript {
         coreKtxVersion = '1.2.0'
         coroutinesVersion = '1.3.5'
         eddsaVersion = '0.3.0'
-        fragmentVersion = '1.2.3'
+        fragmentVersion = '1.2.4'
         jsr305Version = '3.0.2'
         junitVersion = '4.13'
         kotlinVersion = '1.3.71'

ui/proguard-rules.pro

@@ -4,3 +4,11 @@
 
 # Retain some information to keep stacktraces usable
 -keepattributes SourceFile,LineNumberTable
+
+# Fragment 1.2.4 allows Fragment classes to be obfuscated but
+# databinding references in XML seem to not be rewritten to
+# match, so we preserve the names as 1.2.3 did.
+-if public class ** extends androidx.fragment.app.Fragment
+-keep public class <1> {
+    public <init>();
+}