feat: Drop support for React Native <0.78 (#2734)

# Summary

This change implements our new maintenance policy of supporting only the
two most recent React Native releases. With React Native now at 0.80,
the library will support only versions 0.78 and newer. Dropping older
versions helps reduce maintenance overhead, remove legacy code paths and
ensure we can take advantage of the latest React Native APIs without
additional compatibility layers.

## Test Plan

Run test app examples

---------

Co-authored-by: Kacper Żółkiewski <kacperzolkiewski@MacBook-Pro-Kacper.local>

Author: kacperzolkiewski

android/build.gradle

@@ -121,24 +121,6 @@ android {
                     "src/paper/java",
                 ]
             }
-
-            if (REACT_NATIVE_MINOR_VERSION >= 75) { // Use for react-native@0.75 and above
-                // borderRadius fix https://github.com/software-mansion/react-native-svg/pull/2415
-                srcDirs += "src/SvgViewManager75/java"
-                // processTransform replacement https://github.com/software-mansion/react-native-svg/pull/2554
-                srcDirs += "src/RenderableViewManager75/java"
-            } else { // Maintain compatibility with react-native@0.73 and react-native@0.74
-                srcDirs += "src/SvgViewManager73/java"
-                srcDirs += "src/RenderableViewManager73/java"
-            }
-
-            if (REACT_NATIVE_MINOR_VERSION >= 74) { // Use for react-native@0.74 and above
-                // new API https://github.com/software-mansion/react-native-svg/pull/2541
-                srcDirs += "src/SvgPackage74/java"
-            } else {
-                // Maintain compatibility with react-native@0.73
-                srcDirs += "src/SvgPackage73/java"
-            }
         }
     }
 }
@@ -155,13 +137,11 @@ repositories {
 
 dependencies {
     implementation 'com.facebook.react:react-native:+'
-    if (REACT_NATIVE_MINOR_VERSION >= 76) {
-        implementation("com.facebook.fresco:fresco:${FRESCO_VERSION}") {
-            exclude group: 'com.facebook.soloader'
-        }
-        implementation("com.facebook.fresco:imagepipeline-okhttp3:${FRESCO_VERSION}") {
-            exclude group: 'com.facebook.soloader'
-        }
-        implementation("com.facebook.fresco:middleware:${FRESCO_VERSION}")
+    implementation("com.facebook.fresco:fresco:${FRESCO_VERSION}") {
+        exclude group: 'com.facebook.soloader'
+    }
+    implementation("com.facebook.fresco:imagepipeline-okhttp3:${FRESCO_VERSION}") {
+        exclude group: 'com.facebook.soloader'
     }
+    implementation("com.facebook.fresco:middleware:${FRESCO_VERSION}")
 }