1) renamed test build type to 'debugTest' because updated gradle

plugin doesn't allow build types to start with 'test'.

2) exclude support-annotations to avoid warning

Closes #3273
// FREEBIE

build.gradle

@@ -76,7 +76,11 @@ dependencies {
         exclude group: 'org.hamcrest', module: 'hamcrest-core'
     }
     androidTestCompile ('com.squareup.assertj:assertj-android:1.0.0') {
-        exclude group: 'org.hamcrest', module: 'hamcrest-core'
+        exclude group: 'org.hamcrest',        module: 'hamcrest-core'
+        exclude group: 'com.android.support', module: 'support-annotations'
+    }
+    androidTestCompile ('com.android.support.test:runner:0.2') {
+        exclude group: 'com.android.support', module: 'support-annotations'
     }
     androidTestCompile ('com.android.support.test.espresso:espresso-core:2.1') {
         exclude group: 'javax.inject'
@@ -131,7 +135,7 @@ dependencyVerification {
 android {
     compileSdkVersion 22
     buildToolsVersion '22.0.1'
-    testBuildType "testing"
+    testBuildType "debugTest"
 
     dexOptions {
         javaMaxHeapSize "4g"
@@ -186,8 +190,8 @@ android {
             proguardFiles = buildTypes.debug.proguardFiles
             signingConfig signingConfigs.release
         }
-        testing.initWith(buildTypes.debug)
+        debugTest.initWith(buildTypes.debug)
-        testing {
+        debugTest {
             proguardFile 'proguard-testing.pro'
             buildConfigField "String", "PUSH_URL", "\"https://textsecure-service-staging.whispersystems.org\""
         }

src/org/thoughtcrime/securesms/database/PartDatabase.java

@@ -640,15 +640,5 @@ public class PartDatabase extends Database {
     public boolean isValid() {
       return rowId >= 0 && uniqueId >= 0;
     }
-
-    @Override
-    public boolean equals(Object object) {
-      if (!(object instanceof PartId)){
-        return false;
-      }
-
-      PartId other = (PartId) object;
-      return rowId == other.rowId && uniqueId == other.uniqueId;
-    }
   }
 }

test/androidTest/java/org/thoughtcrime/securesms/database/PartDatabaseTest.java

@@ -34,21 +34,24 @@ public class PartDatabaseTest extends TextSecureTestCase {
   }
 
   public void testTaskNotRunWhenThumbnailExists() throws Exception {
-    when(database.getPart(new PartId(ROW_ID, UNIQUE_ID))).thenReturn(getPduPartSkeleton("x/x"));
+    final PartId partId = new PartId(ROW_ID, UNIQUE_ID);
-    doReturn(mock(InputStream.class)).when(database).getDataStream(any(MasterSecret.class), any(PartId.class), eq("thumbnail"));
 
-    database.getThumbnailStream(null, new PartId(ROW_ID, UNIQUE_ID));
+    when(database.getPart(partId)).thenReturn(getPduPartSkeleton("x/x"));
+    doReturn(mock(InputStream.class)).when(database).getDataStream(any(MasterSecret.class), any(PartId.class), eq("thumbnail"));
+    database.getThumbnailStream(null, partId);
 
     verify(database, never()).updatePartThumbnail(any(MasterSecret.class), any(PartId.class), any(PduPart.class), any(InputStream.class), anyFloat());
   }
 
   public void testTaskRunWhenThumbnailMissing() throws Exception {
-    when(database.getPart(new PartId(ROW_ID, UNIQUE_ID))).thenReturn(getPduPartSkeleton("image/png"));
+    final PartId partId = new PartId(ROW_ID, UNIQUE_ID);
+
+    when(database.getPart(partId)).thenReturn(getPduPartSkeleton("image/png"));
     doReturn(null).when(database).getDataStream(any(MasterSecret.class), any(PartId.class), eq("thumbnail"));
     doNothing().when(database).updatePartThumbnail(any(MasterSecret.class), any(PartId.class), any(PduPart.class), any(InputStream.class), anyFloat());
 
     try {
-      database.new ThumbnailFetchCallable(mock(MasterSecret.class), new PartId(ROW_ID, UNIQUE_ID)).call();
+      database.new ThumbnailFetchCallable(mock(MasterSecret.class), partId).call();
       throw new AssertionError("didn't try to generate thumbnail");
     } catch (FileNotFoundException fnfe) {
       // success