Android: Refactor JNI method references to use lambdas.

The method references prevent the generated JNI wrapper classes from
being fully inlined.

Bug: 993421
Change-Id: Id4771b73cd28ba462d8cdf950573575ab215f1ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893990Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Eric Stevenson <estevenson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711441}

base/android/java/src/org/chromium/base/MemoryPressureListener.java

@@ -60,7 +60,7 @@ public class MemoryPressureListener {
      */
     @CalledByNative
     private static void addNativeCallback() {
-        addCallback(MemoryPressureListenerJni.get()::onMemoryPressure);
+        addCallback((pressure) -> MemoryPressureListenerJni.get().onMemoryPressure(pressure));
     }
 
     /**

base/android/java/src/org/chromium/base/library_loader/LibraryPrefetcher.java

@@ -52,7 +52,7 @@ public class LibraryPrefetcher {
         if (coldStart && CommandLine.getInstance().hasSwitch("log-native-library-residency")) {
             // LibraryPrefetcherJni.get().periodicallyCollectResidency() sleeps, run it on another
             // thread, and not on the thread pool.
-            new Thread(LibraryPrefetcherJni.get()::periodicallyCollectResidency).start();
+            new Thread(() -> LibraryPrefetcherJni.get().periodicallyCollectResidency()).start();
             return;
         }