Fix ReactImagePropertyTest SoLoader failures (facebook#19607)

Summary:
Fixes facebook#18637 & facebook#19309

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Check Android `ReactImagePropertyTest` tests pass.

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 [ANDROID] [BUGFIX] [Unit Tests] - Fix ReactImagePropertyTest SoLoader failure

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    CATEGORY
  [----------]      TYPE
  [ CLI      ] [-------------]    LOCATION
  [ DOCS     ] [ BREAKING    ] [-------------]
  [ GENERAL  ] [ BUGFIX      ] [ {Component} ]
  [ INTERNAL ] [ ENHANCEMENT ] [ {Filename}  ]
  [ IOS      ] [ FEATURE     ] [ {Directory} ]   |-----------|
  [ ANDROID  ] [ MINOR       ] [ {Framework} ] - | {Message} |
  [----------] [-------------] [-------------]   |-----------|

 EXAMPLES:

 [IOS] [BREAKING] [FlatList] - Change a thing that breaks other things
 [ANDROID] [BUGFIX] [TextInput] - Did a thing to TextInput
 [CLI] [FEATURE] [local-cli/info/info.js] - CLI easier to do things with
 [DOCS] [BUGFIX] [GettingStarted.md] - Accidentally a thing/word
 [GENERAL] [ENHANCEMENT] [Yoga] - Added new yoga thing/position
 [INTERNAL] [FEATURE] [./scripts] - Added thing to script that nobody will see
-->
Closes facebook#19607

Differential Revision: D8325415

Pulled By: hramos

fbshipit-source-id: 598baa3499646bb50da065815c19bb9f76bf6c87

Author: AndrewJack

ReactAndroid/src/test/java/com/facebook/react/views/BUCK

@@ -13,6 +13,7 @@ rn_robolectric_test(
         react_native_dep("libraries/fresco/fresco-react-native:fresco-drawee"),
         react_native_dep("libraries/fresco/fresco-react-native:fresco-react-native"),
         react_native_dep("libraries/fresco/fresco-react-native:imagepipeline"),
+        react_native_dep("libraries/soloader/java/com/facebook/soloader:soloader"),
         react_native_dep("third-party/java/fest:fest"),
         react_native_dep("third-party/java/jsr-305:jsr-305"),
         react_native_dep("third-party/java/junit:junit"),

ReactAndroid/src/test/java/com/facebook/react/views/image/ReactImagePropertyTest.java

@@ -20,6 +20,7 @@
 import com.facebook.react.uimanager.ReactStylesDiffMap;
 import com.facebook.react.uimanager.DisplayMetricsHolder;
 import com.facebook.react.uimanager.ThemedReactContext;
+import com.facebook.soloader.SoLoader;
 
 import org.junit.After;
 import org.junit.Before;
@@ -53,6 +54,7 @@ public class ReactImagePropertyTest {
 
   @Before
   public void setup() {
+    SoLoader.setInTestMode();
     mContext = new ReactApplicationContext(RuntimeEnvironment.application);
     mCatalystInstanceMock = ReactTestHelper.createMockCatalystInstance();
     mContext.initializeWithInstance(mCatalystInstanceMock);