[Gradle] Update library source and target compatibility to Java 8 and add lambda + method reference usage

PiperOrigin-RevId: 443370295

Author: dsn5ft

build.gradle

@@ -202,8 +202,8 @@ subprojects {
         // This disables the builds tools automatic vector -> PNG generation
         defaultConfig.generatedDensities = []
 
-        compileOptions.sourceCompatibility JavaVersion.VERSION_1_7
-        compileOptions.targetCompatibility JavaVersion.VERSION_1_7
+        compileOptions.sourceCompatibility JavaVersion.VERSION_1_8
+        compileOptions.targetCompatibility JavaVersion.VERSION_1_8
 
         aaptOptions.additionalParameters "--no-version-vectors"
 

lib/java/com/google/android/material/snackbar/Snackbar.java

@@ -343,13 +343,10 @@ public Snackbar setAction(
       tv.setVisibility(View.VISIBLE);
       tv.setText(text);
       tv.setOnClickListener(
-          new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-              listener.onClick(view);
-              // Now dismiss the Snackbar
-              dispatchDismiss(BaseCallback.DISMISS_EVENT_ACTION);
-            }
+          view -> {
+            listener.onClick(view);
+            // Now dismiss the Snackbar
+            dispatchDismiss(BaseCallback.DISMISS_EVENT_ACTION);
           });
     }
     return this;

lib/java/com/google/android/material/timepicker/RadialViewGroup.java

@@ -67,12 +67,7 @@ public RadialViewGroup(@NonNull Context context, @Nullable AttributeSet attrs, i
     TypedArray a =
         context.obtainStyledAttributes(attrs, R.styleable.RadialViewGroup, defStyleAttr, 0);
     radius = a.getDimensionPixelSize(R.styleable.RadialViewGroup_materialCircleRadius, 0);
-    updateLayoutParametersRunnable = new Runnable() {
-      @Override
-      public void run() {
-        updateLayoutParams();
-      }
-    };
+    updateLayoutParametersRunnable = this::updateLayoutParams;
     a.recycle();
   }