Update androidx.browser to 1.7.0 (#376)

See related common PR:
AzureAD/microsoft-authentication-library-common-for-android#2745

Author: shahzaibj

gradle/versions.gradle

@@ -24,7 +24,7 @@ ext {
     androidxCoreVersion = "1.5.0"
     annotationVersion = "1.0.0"
     appCompatVersion = "1.1.0"
-    browserVersion = "1.0.0"
+    browserVersion = "1.7.0"
     constraintLayoutVersion = "1.1.3"
     dexmakerMockitoVersion = "2.19.0"
     espressoCoreVersion = "3.1.0"